[Association of maternal isolated thyroid peroxidase antibody positive in the first trimester with fetal growth].

OBJECTIVE: To investigate the association of isolated thyroid peroxidase antibody (TPOAb) positive in the first trimester with fetal growth. METHODS: A total of 16 446 pregnant women were included in the birth cohort study, whose last menstrual period was between May 2016 and April 2019 and with singleton pregnancy. Maternal serum samples were collected when they firstly came for prenatal care in the first trimester. The pregnant women were consecutively seen and followed in the hospital and the information of pregnant women was extracted from the electronic medical information system. The pregnant women were divided into isolated TPOAb positive group (n=1 654) and euthyroid group (n=14 792). Three fetal ultrasound examinations were scheduled during the routine prenatal visits at the hospital and were performed by trained sonographers. All fetal growth indicators were quantified as gestational age- and gender- adjusted standard deviation score (Z-score) using the generalized additive models for location, scale and shape (GAMLSS). Fetal growth indicators included estimated fetal weight (EFW), abdominal circumference (AC), biparietal diameter (BPD), femur length (FL) and head circumference (HC). Fetal growth restriction (FGR) was defined as AC or EFW Z-score＜3rd centile based on clinical consensus. Generalized estimating equation (GEE) analysis was applied to assess the association of maternal isolated TPOAb positive with fetal growth. The generalized linear model was further used to analyze the association between isolated TPOAb positive and fetal growth indicator at different gestational ages when the fetal growth indicator was significantly associated with isolated TPOAb positive in the GEE mo-del. RESULTS: The median gestational age at three ultrasound measurements was 23.6 (23.3, 24.1), 30.3 (29.7, 30.9), 37.3 (37.0, 37.7) weeks, respectively. The BPD Z-score was higher in isolated TPOAb positive women, compared with the euthyroid pregnant women after adjustment (ß=0.057, 95%CI: 0.014-0.100, P=0.009). The generalized linear model showed the BPD Z-score was higher in the isolated TPOAb positive women at the end of 21-25 weeks (ß=0.052, 95%CI: 0.001-0.103, P=0.044), 29-32 weeks (ß=0.055, 95%CI: 0.004-0.107, P=0.035) and 36-40 weeks (ß=0.068, 95%CI: 0.011-0.125, P=0.020), compared with the euthyroid pregnant women. There was no difference in other fetal growth indicators (EFW, AC, FL and HC) and FGR between the isolated TPOAb positive and euthyroid pregnant women. CONCLUSION: The BPD Z-score was slightly increased in the isolated TPOAb positive pregnant women in the first trimester, while other fetal growth indicators were not changed. The reproducibility and practical significance of this result need to be confirmed.

Adaptation of a Brazilian university hospital to clinical treatment of ectopic pregnancy: Lessons learned over 17 years.

OBJECTIVE: To describe and compare the annual success rates of medical treatment in the analyzed period and to evaluate the associated factors. METHODS: Retrospective study with 158 women with tubal pregnancy followed up over 17 years. Statistical analysis was performed using the Cochran-Armitage test, the χ2 test, Mann-Whitney test, and multiple logistic regression. RESULTS: The success rate was 47.4%. There was a trend of significant change in the success rate of clinical treatment over time (Z = 2.01, P = 0.044); it was associated to undergoing treatment between 2012 and 2017 (P = 0.028), the absence of abdominal pain (P = 0.020), receiving a higher dose of methotrexate (P < 0.001), and less time hospitalized (P < 0.001). In the final statistical model, we observed that receiving a higher dose of methotrexate (P = 0.025, odds ratio [OR] 1.03, 95% confidence interval [CI] 1.00-1.06), having a low serum ß-HCG concentration before treatment (P = 0.003, OR 0.87, 95% CI 0.79-0.95), and not having abdominal pain (P = 0.004, OR 4.26, 95% CI 1.61-11.28) were factors associated with a higher chance of successful clinical treatment for tubal pregnancy. CONCLUSION: A greater chance of success was observed among women undergoing clinical treatment from 2012 onwards, who used higher doses of methotrexate, were asymptomatic at admission, and had low concentrations of ß-hCG.

Evaluation of first- and third-trimester afamin levels in preeclampsia

SUMMARY OBJECTIVE: The aim of this study was to investigate serum afamin levels in the first and third trimesters in preeclampsia. METHODS: Serum samples from 118 patients in the first and third trimesters were analyzed. Serum samples were collected from pregnant women who had enrolled in the first trimester. Blood was then collected from pregnant women who had developed preeclampsia and from healthy controls in the third trimester. The collected blood samples were resolved for analysis, and serum afamin concentrations were measured in the first and third trimesters. Preeclampsia and healthy controls were compared. RESULTS: There was no significant difference between the control and preeclampsia groups in terms of age, body mass index, and smoking. Afamin levels in the first and third trimesters were higher in the preeclampsia group than in the control group (p<0.05). In the subgroup analysis of the preeclampsia group, afamin levels were higher in the early-onset preeclampsia group than in the late-onset preeclampsia group in the first and third trimesters (p<0.05). In the receiver operating characteristic analysis afamin levels were 96.23 ng/mL in the first trimester and 123.57 ng/mL in the third trimester as cut-off values for preeclampsia. CONCLUSION: Serum afamin levels are useful for predicting preeclampsia in the first trimester in pregnant women and can be used in clinical practice as a supportive biomarker for the diagnosis of preeclampsia in the third trimester. Meta-analyzes are needed to investigate the effect of afamin levels in the prediction and diagnosis of preeclampsia and to determine the cut-off value.

Exploring the impact of prior spontaneous miscarriage on stress among pregnant women during the first trimester: an observational study.

BACKGROUND: Spontaneous miscarriage (SM) is the most common complication of pregnancy. Its psychological repercussions are widely documented but few studies have investigated its effect on women's experience of a subsequent pregnancy. AIM: To evaluate the impact of prior SM on the level of stress experienced by pregnant women during the first trimester of pregnancy. DESIGN AND SETTING: Cross-sectional, observational study, which was conducted between June and October 2021 in France. METHOD: A self-report questionnaire was distributed to women in the first trimester of pregnancy. Stress was assessed using the Antenatal Perceived Stress Inventory to yield an overall score and a score for three dimensions ('medical and obstetric risks or fetal health'; 'psychosocial changes during pregnancy'; and the 'prospect of childbirth'). Women with a history of prior SM and those without were compared. RESULTS: In total, 93 women were included; 63 without and 30 with a history of prior SM. Prior SM was not associated with the overall score. The score for the dimension 'medical and obstetric risks or fetal health' was significantly higher in women with prior SM (3.00±0.86 versus 2.34±0.80; ß = 0.61 [95% confidence interval {CI} = 0.25 to 0.96]; P = 0.001). Prior SM was significantly associated with the items 'the baby's health' (P = 0.048) and 'the echography' (P = 0.002). CONCLUSION: This study shows a significant impact of prior SM on the level of stress of pregnant women during the first trimester, particularly relating to the medical and obstetric risks or fetal health, underlining the need for appropriate psychological support to be provided to women who experience SM.

Acute adverse events and pregnancy outcome after inactivated COVID-19 vaccination in first trimester / 中华围产医学杂志

Objective:To investigate acute adverse events and pregnancy outcome after vaccination of inactivated COVID-19 vaccine in the first trimester of pregnancy.Methods:The retrospective-prospective cohort study was conducted among pregnant women of 11-13 +6 weeks of gestation who visited the obstetric clinics for prenatal check in Lianyungang Maternal and Child Health Hospital from May to November in 2021, after registration for perinatal health cards in the community. Those who met the inclusion criteria were recruited and were divided into vaccination group and non-vaccination group according to whether they received inactivated COVID-19 vaccine in the first trimester. Women in the vaccination group were further divided into 1-dose group and 2-dose group. Information, including pregnancy-related screening, pregnancy complications, pregnancy outcome and acute adverse events, were collected and compared with independent samples t-test or ANOVA, Kruskal- Wallis H test or Mann-Whitney U test, χ2 test or Fisher's exact probability method. Results:Totally, 105 pregnant women were analyzed in 1-dose group, 90 in 2-dose group, and 194 in non-vaccination group. (1) There were no statistically significant differences in the occurrence of acute adverse events [1-dose group: 2.86% (3/105); 2-dose group: 6.67% (6/90); non-vaccination group: 4.63% (9/194); χ2=1.59; vaccination group was 4.61% (9/195), when compared with non-vaccination group, χ2=0.00], abnormal pregnancy-related screening indicators and abnormal pregnancy outcome among the three groups (all P>0.05), neither between the vaccination and non-vaccination group (all P>0.05). The acute adverse events in these women included fever, pain at the inoculation site, fatigue, local induration and rash.(2) The differences in hypertensive disorders in pregnancy among the three groups were statistically significant [1-dose group: 10.5%(11/105); 2-dose group: 17.8%(16/90); non-vaccination group: 7.7%(15/194); χ2=6.46, P=0.040], and the incidence was higher in the 2-dose group than that in the non-vaccination group (adjusted by Bonferroni, P<0.017). (3) Regarding other pregnancy complications, no difference was found among the three groups (all P>0.05), neither between the vaccination and non-vaccination group (all P>0.05). Conclusion:The risk of acute adverse events and adverse pregnancy outcome is similar in pregnant women who received inactivated COVID-19 vaccine versus those who did not in the first trimester, and regular blood pressure monitoring is recommended for those who received two doses of inactivated COVID-19 vaccine.

The correlation between serum vitamin D and the risk of pre-eclampsia in the early, middle and late stages of pregnancy / 中国医师进修杂志

Objective:To investigate the correlation between serum vitamin D and the risk of pre-eclampsia at the early, middle and late stages of pregnancy.Methods:Pregnant women who registered and delivered in Electric Power Teaching Hospital of Capital Medical University from August 2020 to July 2021 were included. Pregnant women with pre-eclampsia during pregnancy were selected as the case group (150 cases), while pregnant women without any complications after delivery were selected as the control group (600 cases) according to the 1∶4 matching principle (age, pre-pregnancy body mass index and last menstruation). The levels of serum vitamin D in differences stages of pregnancy between the two groups were compared. Logistic regression model was used to analyze the association between serum vitamin D levels and the risk of pre-eclampsia.Results:The levels of serum vitamin D at the early, middle and late stages of pregnancy in the case group were lower than those in the control group: (14.32 ± 3.61) μg/L vs. (18.78 ± 4.73) μg/L, (15.06 ± 3.12) μg/L vs. (19.88 ± 4.25) μg/L, (16.04 ± 3.51) μg/L vs. (22.04 ± 5.63) μg/L, there were statistical differences ( P<0.05). Taking pregnant women with adequate serum Vitamin D as a reference, and adjusting for confounding factors such as gain weight and primipara, the risk of pre-eclampsia in early stages pregnant women with serum Vitamin D serious deficiency, middle deficiency and deficiency was increased and the OR and 95% CI were 4.84(1.25 -31.42), 3.09(1.12 - 8.96), 1.48(1.12 - 13.05); the risk of pre-eclampsia in middle stages pregnant women with serum vitamin D serious deficiency, middle deficiency and deficiency was increased and the OR(95% CI) were 4.43(1.23 - 13.55), 2.22(1.05 - 6.78), 1.12(0.45 - 7.73); the risk of pre-eclampsia in late stages pregnant women with serum vitamin D serious deficiency, middle deficiency and deficiency was increased and the OR(95% CI) were 2.13(1.12 - 8.64), 1.76(1.02 - 4.98), 1.22(0.72 - 3.94). Conclusions:The level of serum vitamin D is associated with the risk of pre-eclampsia in pregnant women in the early, middle and late stages of pregnancy, and the risk of pre-eclampsia is significantly increase when the level of serum vitamin D is severely deficient or deficient during pregnancy.

Association of maternal isolated thyroid peroxidase antibody positive in the first trimester with fetal growth / 北京大学学报(医学版)

OBJECTIVE@#To investigate the association of isolated thyroid peroxidase antibody (TPOAb) positive in the first trimester with fetal growth.@*METHODS@#A total of 16 446 pregnant women were included in the birth cohort study, whose last menstrual period was between May 2016 and April 2019 and with singleton pregnancy. Maternal serum samples were collected when they firstly came for prenatal care in the first trimester. The pregnant women were consecutively seen and followed in the hospital and the information of pregnant women was extracted from the electronic medical information system. The pregnant women were divided into isolated TPOAb positive group (n=1 654) and euthyroid group (n=14 792). Three fetal ultrasound examinations were scheduled during the routine prenatal visits at the hospital and were performed by trained sonographers. All fetal growth indicators were quantified as gestational age- and gender- adjusted standard deviation score (Z-score) using the generalized additive models for location, scale and shape (GAMLSS). Fetal growth indicators included estimated fetal weight (EFW), abdominal circumference (AC), biparietal diameter (BPD), femur length (FL) and head circumference (HC). Fetal growth restriction (FGR) was defined as AC or EFW Z-score＜3rd centile based on clinical consensus. Generalized estimating equation (GEE) analysis was applied to assess the association of maternal isolated TPOAb positive with fetal growth. The generalized linear model was further used to analyze the association between isolated TPOAb positive and fetal growth indicator at different gestational ages when the fetal growth indicator was significantly associated with isolated TPOAb positive in the GEE mo-del.@*RESULTS@#The median gestational age at three ultrasound measurements was 23.6 (23.3, 24.1), 30.3 (29.7, 30.9), 37.3 (37.0, 37.7) weeks, respectively. The BPD Z-score was higher in isolated TPOAb positive women, compared with the euthyroid pregnant women after adjustment (β=0.057, 95%CI: 0.014-0.100, P=0.009). The generalized linear model showed the BPD Z-score was higher in the isolated TPOAb positive women at the end of 21-25 weeks (β=0.052, 95%CI: 0.001-0.103, P=0.044), 29-32 weeks (β=0.055, 95%CI: 0.004-0.107, P=0.035) and 36-40 weeks (β=0.068, 95%CI: 0.011-0.125, P=0.020), compared with the euthyroid pregnant women. There was no difference in other fetal growth indicators (EFW, AC, FL and HC) and FGR between the isolated TPOAb positive and euthyroid pregnant women.@*CONCLUSION@#The BPD Z-score was slightly increased in the isolated TPOAb positive pregnant women in the first trimester, while other fetal growth indicators were not changed. The reproducibility and practical significance of this result need to be confirmed.

Changing Paradigms in the Initial Treatment of Ectopic Pregnancy at a University Hospital in Brazil / Mudança de paradigmas do tratamento inicial de gravidez ectópica em um hospital universitário no Brasil

Abstract Objective To evaluate the use of different treatment options for ectopic pregnancy and the frequency of severe complications in a university hospital. Methods Observational study with women with ectopic pregnancy admitted at UNICAMP Womeńs Hospital, Brazil, between 01/01/2000 and 12/31/2017. The outcome variables were the type of treatment (first choice) and the presence of severe complications. Independent variables were clinical and sociodemographic data. Statistical analysis was carried out by the Cochran-Armitage test, chi-square test, Mann-Whitney test and multiple Cox regression. Results In total 673 women were included in the study. The mean age was 29.0 years (± 6.1) and the mean gestational age was 7.7 (± 2.5). The frequency of surgical treatment decreased significantly over time (z = -4.69; p < 0.001). Conversely, there was a significant increase in the frequency of methotrexate treatment (z = 4.73; p < 0.001). Seventy-one women (10.5%) developed some type of severe complication. In the final statistical model, the prevalence of severe complications was higher in women who were diagnosed with a ruptured ectopic pregnancy at admission (PR = 2.97; 95%CI: 1.61-5.46), did not present with vaginal bleeding (PR = 2.45; 95%CI: 1.41-4.25), had never undergone laparotomy/laparoscopy (PR = 6.69; 95%CI: 1.62-27.53), had a non-tubal ectopic pregnancy (PR = 4.61; 95%CI: 1.98-10.74), and do not smoke (PR = 2.41; 95%CI: 1.08-5.36). Conclusion there was a change in the first treatment option for cases of ectopic pregnancy in the hospital during the period of analysis. Factors inherent to a disease that is more difficult to treat are related to a higher frequency of severe complications.

Resumo Objetivo Avaliar as diferentes opções de tratamento para gravidez ectópica e a frequencia de complicações graves em um hospital universitário. Métodos Estudo observacional com mulheres com gravidez ectópica admitidas no Hospital da Mulher da UNICAMP, no Brasill, entre 01/01/2000 e 31/12/2017. As variáveis de desfecho foram o tipo de tratamento (primeira escolha) e a presença de complicações graves. As variáveis independents foram dados clínicos e sociodemográficos. A análise estatística foi realizada pelo teste de Cochran-Armitage, teste de qui-quadrado, teste de Mann-Whitney e Regressão de Cox Múltipla. Resulados No total, 673 mulheres foram incluídas no estudo. A idade médica foi de 29.0 anos (± 6.1) e a idade gestacional media foi de 7.7 (± 2.5). A frequencia de tratamento cirúrgico diminuiu significativamente ao longo dos anos(z = -4.69; p < 0.001). Simultaneamente, houve um aumento da frequencia do tratamento clínico(z = 4.73; p < 0.001). Setenta e uma mulheres (10.5%) desenvolveram algum tipo de complicação grave. No modelo estatístico final, a prevalência de complicações graves foi maior nas mulheres que tiveram diagnóstico de gestação ectópica rota à admissão (PR = 2.97; 95%CI: 1.61-5.46), que não apresentaram sangramento vaginal (PR = 2.45; 95%CI: 1.41-4.25), sem antecedentes de laparotomia/laparoscopia (PR = 6.69; 95%CI: 1.62-27.53), com gravidez ectópica não-tubária (PR = 4.61; 95%CI: 1.98-10.74), e não tabagistas (PR = 2.41; 95%CI: 1.08-5.36). Conclusão Houve uma mudança na escolha do primeiro tratamento indicado nos casos de gravidez ectópica durante o período analisado. Os fatores inerentes a doença relacionados a maior dificuldade de tratamento foram associados a maior frequencia de complicações graves.

Antenatal urinary retention: Risk factors, treatment, and effect on pelvic floor dysfunction.

OBJECTIVE: Physiological changes to the urinary tract begin early in the first trimester and continue throughout pregnancy. Bladder symptoms vary throughout pregnancy and can remain after the puerperium. Antenatal urinary retention is a severe form of pelvic floor dysfunction and research into this topic is sparse. Little is known about the longer-term effects of antenatal urinary retention on pelvic floor dysfunction. This study aimed to establish the incidence of and risk factors for antenatal urinary retention in our population, and whether this had any impact on pelvic floor dysfunction. STUDY DESIGN: This was a cross-sectional study. Women were included if they were currently pregnant when they required catheterisation-either indwelling, intermittent self-catheterisation or both. The Australian Pelvic Floor Questionnaire was posted to all women. No follow-up reminders were sent and any woman who did not return their questionnaire was recorded as a non-responder. RESULTS: From January 2016 to December 2020, 41 women were identified as needing some form of catheterisation for treatment of antenatal urinary retention. During the same period, 44,646 women attended the National Maternity Hospital, giving an incidence of antenatal urinary retention of 0.92/1000 pregnancies. Questionnaire results were available for 25 women. One woman did not respond to one question, giving 99.9% complete data. The median (range) total pelvic floor score was 4.6 (0.2-10.7). Risk factors for antenatal urinary retention were identified in ten women. Most women denied any specific bladder symptoms, including difficulty in voiding and a feeling of incomplete emptying. CONCLUSIONS: Antenatal urinary retention is an uncommon form of pelvic floor dysfunction and occurs in 1-in-1000 pregnancies. Most women with antenatal urinary retention can be treated with an indwelling catheter for a short period, with only one in four women requiring intermittent self-catheterisation. Retention typically occurs in the late first and early second trimester, and while some risk factors have been identified, most women appear to have an uncomplicated pregnancy before developing acute urinary retention. Reassuringly, long-term pelvic floor dysfunction is minimal in women who experience antenatal urinary retention.

A Patient-Centred Approach to Early Pregnancy Loss: The First 18 Months of a Canadian Outpatient Program for Early Pregnancy Loss (OPEL).

OBJECTIVE: Manual vacuum aspiration is a safe surgical option for the management of early pregnancy loss. To provide rapid, patient-centred access to MVA, an Outpatient Program for Early pregnancy Loss ("OPEL") was established at our institution. Objectives were to (1) assess complete uterine evacuation rates; (2) assess complication rates, and (3) assess patient satisfaction with the program. METHODS: With REB approval, a retrospective study was performed. Patient records from the first 18 months of OPEL (November 2015 to April 2017) were reviewed. Anonymous patient satisfaction questionnaires were completed immediately post-procedure. RESULTS: A total of 162 patients received treatment. Missed abortions accounted for 94 cases (58%). Median delay from referral to clinic appointment was 4.0 (interquartile range [IQR] 2.0-6.0) days. Average length of stay was 3.0 (IQR 2.5-3.0) hours. Efficacy of the procedure was 95.1%. Complication rate (immediate and delayed) was 14.2% and included intraoperative hemorrhage (3.1%; 5/162), Asherman's syndrome (1.9%; 3/162), retained products of conception requiring further treatment (4.9%; 8/162), and postoperative infection requiring antibiotic therapy (1.9%; 3/162). A total of 151 post-procedure satisfaction surveys were completed (93%); 100% agreed/strongly agreed that the nursing staff and physicians provided professional and compassionate care; 99.3% were satisfied with their care overall. Qualitative feedback was positive. CONCLUSION: Pregnant patients experiencing early pregnancy loss benefit from safe, timely, accessible, patient-centred care in the outpatient OPEL program. Similar models should be adopted nationally to ensure women experiencing this common pregnancy complication receive safe and compassionate care.

A model for predicting gestational diabetes mellitus in early pregnancy: a prospective study in Thailand.

OBJECTIVE: To develop a predictive model using the risk factors of gestational diabetes mellitus (GDM) and construct a predictive nomogram for GDM risk in women during early pregnancy. METHODS: A prospective study was conducted in two tertiary hospitals among pregnant women with gestational age ≤14 weeks. Early GDM was diagnosed if an abnormal 100 g oral glucose tolerance test was detected using the Carpenter and Coustan criteria after an abnormal 50 g glucose challenge test. The factors included in the model were ACOG risk factors; maternal age; family history of hypertensive disorder in pregnancy; family history of dyslipidemia; gravida; parity; histories of preterm birth, early fetal death, abortion, stillbirth, and low birth weight; and glycated hemoglobin (HbA1c) levels. The predictive models for early GDM were analyzed using multiple logistic regression analyses. The nomograms were constructed, and their discrimination ability and predictive accuracy were tested. RESULTS: Of the 553 pregnant women, 54 (9.8%) were diagnosed with early GDM. In the integrated model, there was a history of GDM (adjusted odds ratio [aOR], 5.15; 95% confidence interval [CI], 1.82-14.63; P=0.004), HbA1c threshold ≥5.3% (aOR, 2.61; 95% CI, 1.44-4.74; P=0.002), and family history of dyslipidemia (aOR, 2.68; 95% CI, 1.37-5.21; P=0.005). The integrated nomogram model showed that a history of GDM had a high impact on the risk of early GDM. Its discrimination and mean absolute error were 0.76 and 0.009, respectively. CONCLUSION: Application of the predictive model and nomogram will help healthcare providers investigate the probability of early GDM, especially in resource-limited countries.

Two-dimensional ultrasound combined with HD-live silhouette technology in embryos/fetuses with normal or abnormal central nervous system during early pregnancy / 中华围产医学杂志

Objective:To study the ultrasonographic characteristics of embryos/fetuses with normal or abnormal central nervous system (CNS) from 7 to 13 +6 weeks of gestation using high resolution two-dimensional ultrasound combined with HD-live silhouette technology and provide a reference for early diagnosis of CNS abnormalities. Methods:Eighty normal embryos/fetuses during 7-13 +6 weeks and 41 fetuses with CNS malformations in early pregnancy during 11-13 +6 weeks were selected to observe the ultrasonographic features of embryos/fetuses with normal or abnormal CNS using transvaginal high resolution two-dimensional ultrasound and HD-live silhouette technology. Descriptive analysis was performed on the results. Results:From seven weeks of gestational age, high resolution two-dimensional ultrasound combined with HD-live silhouette technology can clearly and stereoscopically show the prosencephalon, mesencephalon and rhombencephalon. The rhombencephalon changed the most in the brain development of embryos. At nine weeks of gestation, cleared structures of pons curvature, the fourth ventricle and cisterna magna were observed. The developing cerebellum and the original Blake pouch cyst were seen at 10 weeks of gestation. From 11 to 13 +6 weeks, the most remarkable change was the choroid plexus of the fourth ventricle changed from perpendicular to parallel to the long axis of the neural tube. Of the 41 fetuses with CNS malformation, 16 (39.0%) were exencephaly, 11 (26.8%) were holoprosencephaly, five (12.2%) were encephalocele, four (9.7%) were anencephaly, three (7.3%) were fourth ventricle dilatation, and two (4.9%) were open spina bifida. Conclusions:High resolution two-dimensional ultrasound combined with HD-live silhouette technology can clearly and stereoscopically display the morphological changes in embryonic embryos/fetuses with development of normal CNS at 7-13 +6 weeks, which is helpful to better understand the origin of CNS embryonic abnormalities and provide diagnostic clues for the early detection of CNS abnormalities.

Predictive value of transvaginal ultrasound measurement of cervical length in first and second trimester on spontaneous preterm birth in singleton pregnancies / 中华围产医学杂志

Objective:To explore the predictive value of transvaginal ultrasound measurement of cervical length (CL) in the first and second trimester on spontaneous preterm birth in singleton pregnant women.Methods:This study retrospectively recruited 2 254 singleton pregnancies without severe comorbidities at Peking University First Hospital from January 2019 to June 2019. CL was measured for all subjects using transvaginal ultrasound in the first (11-13 +6 weeks) and second trimester (21-23 +6 weeks). Differences in CL between women with preterm (preterm group) and full-term delivery (full-term group) as well as the CL during the first and second trimester were compared. The independent risk factors for preterm birth and the predictive value of CL in the first and second trimester for spontaneous preterm birth were also explored. Fisher's exact test, t-test, χ2 test, and logistic regression analysis, etc, were adopted for statistical analysis. Results:(1) For the 2 254 subjects, CL measured in the first trimester and second trimester were (36.1±4.2) mm (22.4-52.6 mm) and (36.9±5.3) mm (2.9-59.7 mm), respectively. The incidence of short cervix in the first trimester and second trimester were 0.31% (7/2 254) and 1.46% (33/2 254), respectively. When CL was ≤25.0 mm ( OR=43.92, 95% CI:6.83-282.49) or >25.0-≤30.3 mm ( OR=6.59, 95% CI:1.97-22.0) in the first trimester, the risk of short cervix increased in the second trimester (both P<0.05). (2) The total incidence of preterm delivery was 3.06% (69/2 254). CL and the incidence of short cervix did not differ significantly in the first trimester between the preterm and full-term group [(35.2±4.5) and (36.1±4.1) mm, t=－1.78, P=0.076; 1.5% (1/69) and 0.3% (6/2 185), χ 2=2.98, P=0.084]. Compared with the full-term group, CL was shorter and the incidence of short cervix was higher in the second trimester in the preterm group [(33.6±6.7) vs (37.0±5.2) mm, t=－5.12;8.7% (6/69) vs 1.2% (27/2 185), χ 2=25.80, P<0.001]. (3) Multivariate regression analysis showed that age ≥35 years ( OR=2.05, 95% CI:1.22-3.46), history of spontaneous preterm birth ( OR=25.25, 95% CI:5.01-127.28), conception assisted by reproductive technology ( OR=10.39, 95% CI:2.39-50.33), and short cervix during the second trimester were independent risk factors for premature delivery. (4) There was no significant difference in the risk of preterm delivery when comparing to those with CL≤25.0 mm, >25.0-≤30.3 mm, >30.3-≤33.0 mm, >33.0-≤35.7 mm, >35.7-≤38.7 mm women with CL>38.7 mm during the first trimester (all P>0.05). The risk of premature delivery was relatively increased for those with CL≤25.0 mm,>25.0-≤29.5 mm, >29.5-≤33.6 mm, >33.6~≤36.8 mm, >36.8~≤40.1 mm during the second trimester compared to those with CL>40.1 mm [ OR (95% CI):17.64 (4.99-62.32), 6.89 (2.11-22.55), 3.58 (1.34-9.59), 4.04 (1.58-10.32), 3.34 (1.28-8.67), respectively , all P<0.05]. (5) When CL≤25.0 mm and ≤29.5 mm in the second trimester were used as the cut-off value, the prediction of preterm delivery was with a sensitivity of 8.70% and 17.39%, specificity of 98.80% and 95.29%, positive predictive value of 18.20% and 10.43%, negative predictive value of 97.16% and 97.34%, and the accuracy rate of 96.01% and 92.90%, respectively. Conclusions:There were no significant differences in CL and the incidence of short cervix during the first trimester among women with preterm or full-term delivery. CL in the first trimester is not an independent risk factor for preterm birth, but the risk of short cervix in the second trimester is increased when CL≤30.3 mm in the first trimester. The shorter the cervix during the second trimester, the greater the risk of preterm birth.

Prenatal diagnosis and pregnancy outcome of increased nuchal translucency with or without nuchal cystic hygroma in fetuses during first trimester / 中华围产医学杂志

Objective:To compare the prenatal diagnosis and pregnancy outcome of increased nuchal translucency (NT) with or without nuchal cystic hygroma (CH) in fetuses with first-trimester NT ≥5 mm.Methods:Data from 131 fetuses with NT ≥5 mm who received invasive prenatal diagnosis at Guangzhou Women and Children's Medical Center from July 2017 to December 2020 were retrospectively collected and analyzed. Those with a septum in the cyst were grouped as NT with CH group ( n=57), and those without as increased NT without CH group ( n=74). Genetic test results, incidence of structural malformations, survival rate after birth were compared using Chi-square test or Fisher's exact test and non-parametric test. Results:There was no significant difference in the incidence of fetal genetic abnormalities[67.6%(50/74) vs 61.4%(35/57), χ 2=0.54, P=0.464], ultrasonic structural malformations [21.6%(16/74) vs 33.3%(19/57), χ 2=2.26, P=0.133], or in the survival rate (12/14 vs 3/8, P=0.053) between increased NT without CH group and NT with CH group. Conclusions:For increased NT with or without CH, although the two groups had different spectrum of disease, they had a high incidence of chromosomal abnormalities and structural malformations, and both groups had a certain healthy survival rate after birth.

Association between thyroid function in the first trimester in twin pregnancies and gestational diabetes mellitus / 中华围产医学杂志

Objective:To explore the associations between thyroid function in the first trimester in twin pregnancies and gestational diabetes mellitus (GDM) and the risk factors of twin pregnancies complicated by GDM.Methods:Retrospective analysis was performed on 745 twin pregnancies delivered after 28 weeks at the Third Affiliated Hospital of Sun Yat-sen University from January 2015 to December 2021, and they were divided into GDM group ( n=186) and the control (non-GDM) group ( n=559). Thyroid dysfunction was diagnosed based on the reference range of singleton and twin pregnancies recommended by the Guideline on diagnosis and management of thyroid diseases (2nd edition) in China and the literature, respectively. Independent sample t-test, Chi-square test, or Fisher exact test, and Mann-Whitney U test were used to compare the general clinical characteristics and thyroid function between the two groups. Spearman rank correlation analysis was performed to analyze the correlation between free thyroxine (FT 4), thyroid stimulating hormone (TSH), thyroid peroxidase antibody (TPOAb), and fasting plasma glucose (FPG) in the first trimester as well as glucose levels in 75 g oral glucose tolerance test (OGTT). The associations between FT 4, TSH at different levels, and the detection rate of GDM, and the risk factors of GDM in twin pregnancies were analyzed using logistic regression. Results:(1) The prevalence of GDM in twin pregnancies was 25.0% (186/745). The positive rate of TPOAb was 13.6% (101/745). FPG in the first trimester was higher in the GDM group than that in the control [(4.7±0.5) vs (4.5±0.4) mmol/L, t=－5.08, P<0.001]. (2) No correlation between FT 4, TSH levels, the positive rate of TPOAb in the first trimester and FPG in the first trimester as well as OGTT results was found (all P>0.05). (3) There was no significant difference when using the thyroid function reference range for twin or singleton pregnancy in detecting hypothyroidism [0.5% (4/745) vs 0.4% (3/745)] and subclinical hypothyroidism [1.2% (9/745) vs 1.3% (10/745)] among the included subjects (both P>0.05), however, there were significant differences in the detection rates of hypothyroxinemia alone [25.0% (186/745) vs 12.9% (96/745)], hyperthyroidism [2.4% (18/745) vs 12.9% (96/745)] and subclinical hyperthyroidism [5.8% (43/745) vs 12.1% (90/745)]( χ2 were 35.43, 33.43 and 18.24, all P<0.001). There was no significant difference in the detection rate of thyroid disease between the GDM and control groups (all P>0.05). (4) FT 4 and TSH levels were grouped into quartiles ( Q1, Q2, Q3, and Q4), which showed that the detection rate of GDM was the highest [27.8% (52/187)] in women with FT 4 in Q1 and was the lowest [23.0% (43/187)] in those with FT 4 in Q2. However, the detection rate was the lowest in women with TSH in Q1 [24.1% (45/187)] and was the highest [27.4%(51/186)] in those with TSH in Q4. Taking Q1 of FT 4 and TSH as a reference, the logistic regression model showed that there were no statistically significant differences between FT 4, TSH at different levels, and GDM, even after adjusting for age, preconception-body mass index (pre-BMI), family history of diabetes, mode of conception, and chorionicity (all P>0.05). (5) Multivariate logistic regression analysis showed that maternal age ( OR=1.10, 95% CI: 1.05-1.15), pre-BMI ( OR=1.13, 95% CI: 1.07-1.21), family history of diabetes ( OR=2.73, 95% CI: 1.53-4.85), and FPG in the first trimester ( OR=2.14, 95% CI: 1.38-3.32) were independent risk factors for twin pregnancies complicated by GDM. Conclusions:Twin pregnant women with higher maternal age, pre-BMI, FPG in the first trimester and family history of diabetes were at higher risk of GDM. No significant correlation is found between maternal thyroid function in the first trimester and GDM in twin pregnancies.

Maternal stress perception in the first or second trimester affects breastfeeding behavior: a prospective cohort study / 中华围产医学杂志

Objective:To explore the effect of maternal stress perception and plasma serotonin level in the first or second trimester on breastfeeding behavior, and to provide evidence for promoting exclusive breastfeeding.Methods:This prospective cohort study recruited pregnant women (≤20 gestational weeks) from Maternal and Child Health Center of Gulou District from April 2019 to March 2020. Stress perception at study enrollment was evaluated using Perceived Stress Scale (PSS) and the maternal plasma serotonin level was detected. Telephone interviews were conducted 42 d after delivery to collect information on childbirth and breastfeeding. Chi-square test, two independent samples t-test, and logistic regression model were used to analyze the risk factors of non-exclusive breastfeeding. Results:A total of 366 pregnant women were enrolled and 353 (96.4%) of them completed telephone interviews, who were divided into the exclusive ( n=194) and non-exclusive breastfeeding group ( n=159). Univariate analysis showed that the PSS scores [(19.4±6.9) vs (21.1±6.9) scores, t=－2.25, P=0.026] and the proportion of high-stress perception [23.7% (46/194) vs 34.0% (54/159), χ 2=4.03, P=0.045] in the exclusive group were all significantly lower than those in non-exclusive group. In the logistic regression analysis, exclusive breastfeeding was set as the dependent variable and the independent variables included factors with P<0.200 in the univariate analysis (PSS scores or PSS rating, plasma serotonin level, age, delivery mode) and potential clinical risk factors (parity, preterm birth). The results showed that when PSS was considered as a continuous variable, total PSS scores in the first or second trimester was an independent risk factor for non-exclusive breastfeeding ( OR=1.043, 95% CI: 1.010-1.077, P=0.011) and so was the high-stress perception when PSS was considered as a categorical variable (PSS rating) ( OR=1.765, 95% CI: 1.097-2.854, P=0.020). Conclusions:Overstress in the first or second trimester will affect breastfeeding patterns. Mental health counseling may help relieve perinatal stress, which will further increase the exclusive breastfeeding rate.

Effectiveness of automated machine learning models in predicting the risk of preeclampsia in the first trimester / 中华健康管理学杂志

Objective:To explore the application value of automated machine learning (autoML) model in predicting the risk of preeclampsia in the first trimester.Methods:From January 2017 to October 2020, 2 180 singleton pregnant women who were registered in Jinan Second Maternal and Child Health Hospital and underwent pregnancy examination at 12 weeks of gestation were selected. The pregnant women were divided into preeclampsia group (103 cases) and control group (2 077 cases) according to the occurrence of preeclampsia. The differences in clinical data and hematological indexes in the two groups were compared, and the correlation between each index and the risk of preeclampsia was analyzed too. All the pregnant women were randomly divided into training set and test set according to the ratio of 7∶3, and the autogluon autoML algorithm was used to build a variety of machine learning models, and training and cross-validation were performed in the training set to compare the accuracy of the different models. The importance of each index in the autoML model was analyzed, and the autoML model and the logistic regression model were used to predict the risk of preeclampsia in pregnant women in the test set respectively, and the receiver operating characteristic (ROC) curve was used to evaluate the prediction performance of the autoML and the logistic regression model.Results:The age, pre-pregnancy body mass index, body mass index at 12 weeks of gestation, waist circumference at 12 weeks of gestation, proportion of drinking history, high-sensitivity C-reactive protein (hs-CRP), triglyceride, low-density lipoprotein cholesterol (LDL-C), aspartate aminotransferase (AST), platelet distribution width (PDW), mean platelet volume, thyroid stimulating hormone (TSH) and β-human chorionic gonadotropin were all significantly higher than those in the control group (all P<0.05), and the free tri-iodothyronine (free T3), free thyroxine (free T4), placental growth factor (PIGF), soluble fms-like tyrosine kinase-1 (sFlt-1) and pregnancy-associated plasma protein-A (PAPP-A) were all significantly lower than those in the control group (all P<0.05). Correlation analysis showed that the correlation between pre-pregnancy body mass index, body mass index at 12 weeks gestation, waist circumference at 12 weeks gestation, hs-CRP, triacylglycerol, AST, TSH, free T3, free T4, β-HCG, PIGF, sFlt-1, PAPP-A and preeclampsia risk were obviously higher; but the correlation between each index were lower. A total of 18 models in 8 categories were constructed with the autoML model algorithm, and the neural network _L2 based on FastAI had the highest accuracy in the training set (0.963) and the validation set (0.971). The TSH, LDL-C, PDW, waist circumference at 12 weeks of gestation, sFlt-1, AST were more important in the model, while the free T4, total cholesterol, pregnancy times, drinking history, parity and family history of hypertension were less important indicators. The area under the ROC curve of the autoML model for predicting the risk of preeclampsia in the first trimester was significantly higher than that of the logistic regression model (0.984 vs 0.765, P=0.002), while there was no statistical difference in the prediction accuracy of the two prediction models in the training set ( P>0.05). The prediction accuracy and sensitivity of the autoML model in the test set were both significantly higher than those of the logistic regression model (99.54% vs 98.32%, 93.75% vs 75.00%, both P<0.05). Conclusions:Factors such as TSH, LDL-C, PDW, waist circumference, sFlt-1 and AST in the first trimester of pregnancy have a certain correlation with the risk of preeclampsia. The autoML model based on the indicators of the first trimester has a high predictive value for the risk of preeclampsia.

Relación entre anemia del primer trimestre y bajo peso al nacer en cuatro Centros de Salud Materno-Infantiles de Lima Sur durante el 2019 / Relationship between first trimester anemia and low birth weight in four mother-and-child health centers in Lima Sur during 2019

RESUMEN Objetivo: Determinar la relación entre la anemia materna del primer trimestre y el bajo peso al nacer de cuatro centros de salud maternos de Lima-Sur durante el 2019. Materiales y métodos: Se realizó un estudio cohorte retrospectivo de una base de datos secundaria donde se incluyeron gestantes atendidas en cuatro Centros de Salud con nivel de complejidad I-4 de Lima-Sur; cuyos partos se registraron durante el 2019, excluyendo a los recién nacidos pretérmino. Una hemoglobina del primer trimestre <11 g/dl se definió como anemia y un peso <2500 g como bajo peso al nacer. Se calculó la incidencia acumulada según anemia y se halló el riesgo relativo (RR) ajustado a potenciales confusores. Resultados: Se incluyó 221 gestantes y el 76 % tuvo una edad entre 18 a 35 años. Un 42 % fue primigesta, un 52 % presentó exceso de peso y el 60 % realizó 6 o más controles prenatales. Un 23,5 % de gestantes presentó anemia en el primer trimestre y se halló una incidencia de 2,7 % casos con bajo peso al nacer. La anemia del primer trimestre elevó en 11 veces la incidencia de recién nacidos con bajo peso, independiente de la edad, índice de masa corporal y paridad (RR ajustado = 11,1; IC 95 % 1,3 - 97,2; p=0,029). Conclusiones: De la muestra estudiada, una de cada cuatro gestantes presenta anemia durante el primer trimestre incrementando la incidencia acumulada de tener un neonato con bajo peso hasta en 11 veces.

ABSTRACT Objective: To determine the relationship between maternal anemia in the first trimester of pregnancy and low birth weight in four mother-and-child-health centers in Southern Lima during 2019. Material and methods: A retrospective cohort study from a secondary database was performed, where pregnant women from 4 middle-complexity Health Centers from Southern Lima were included. Deliveries took place during 2019, excluding preterm newborns. First trimester hemoglobin concentration <11 g/dL was defined as anemia and birth weight <2500 g was defined as low birth weight. Cumulative incidence for anemia was calculated, and relative risk (RR) adjusted for potential confounders was also calculated. Results: Two hundred and twenty one pregnant women were included. Seventy-six per cent were between 18 and 35 years old. Forty-two percent were primigravida, fifty-two percent had excess body weight, and sixty percent had six or more prenatal control visits. Nearly one quarter (23,5%) of all pregnant women had anemia during the first trimester, and there were 2,7% cases of low birth weight. Anemia during the first trimester of pregnancy increased 11 times the frequency of newborns with low birth weight, independently of age, body mass index, and parity (adjusted RR = 11,1; 95% CI: 1,3-97,2; p= 0,029). Conclusions: In the studied sample, one out of four pregnant women had anemia during the first trimester of pregnancy, increasing up to 11 times the cumulative incidence for having a neonate with low birth weight.

Committee Opinion No. 418: The Complete 11-14 Week Prenatal Sonographic Examination.

OBJECTIVE: Sonography during the first trimester provides an opportunity to assess a pregnancy in its early stage. This document provides an opinion about the implementation and content of prenatal sonographic examinations at 11-14 weeks gestation in Canada. TARGET POPULATION: Pregnant women at 11-14 weeks gestation. BENEFITS, HARMS, AND COSTS: The 11-14 week prenatal sonographic examination can provide important information that may contribute to pregnancy management. It can be used to confirm viability, establish gestational age, determine the number of fetuses, assess the adnexa/ovaries, and, in a multiple pregnancy, assess chorionicity and amnionicity. Scanning also offers an opportunity to detect fetal abnormalities and perform aneuploidy screening by measuring the nuchal translucency thickness. It may be valuable in screening for preeclampsia and other obstetrical disorders (by combining uterine artery Doppler scanning with other bio-clinical markers) and for invasive placentation. There are no physical harms to mother or fetus from offering a routine 11-14 week prenatal sonographic examination, and there are no extra costs for patients. EVIDENCE: Articles related to routine 11-14 week prenatal sonography were identified in a search of EMBASE and MEDLINE using the search terms first trimester ultrasound, nuchal translucency, and 11-14 week ultrasound. The search included all articles published on the topic until May 2019. Abstracts were reviewed by one author, and articles deemed relevant were then reviewed in full to determine whether to include them in the study. Articles that were not in English and articles that did not pertain to 11-14 week prenatal sonography were excluded. INTENDED AUDIENCE: This document is intended for sonographers, midwives, family physicians, obstetricians, and maternal-fetal medicine specialists.

Does Excess First- or Second-Trimester Weight Gain Predict Excess Total Gestational Weight Gain? A Multicentre Prospective Cohort Study.

OBJECTIVES: Early excess gestational weight gain (GWG) has been examined as a predictor of total excess GWG in a few international studies; however, Canadian data are lacking. We sought to determine whether early (first- and second-trimester) excess GWG predicted total excess GWG. METHODS: We conducted an a priori planned secondary analysis of a multicentre prospective study of English-speaking Ontario women with a singleton pregnancy between 80 and 206 weeks gestation. Our primary outcome was prediction of total excess GWG. We calculated the sensitivity, specificity, predictive values, and likelihood ratios, by body mass index (BMI), for excess first- and second-trimester GWG. RESULTS: Of the 970 women who met the inclusion criteria, 387 and 754, had first- and second-trimester weights recorded in their antenatal record, respectively. For normal, overweight, and obese women, the sensitivity of excess first-trimester GWG for total excess gain was 66%, 68%, and 65%, respectively; and the specificity was 48%, 43%, and 36%, respectively. The sensitivity of excess second-trimester GWG for total excess gain for normal weight, overweight, and obese women was higher, at 92%, 96%, and 95%, respectively; while the specificity was low at 31%, 16%, and 29%, respectively. CONCLUSION: In the first known Canadian study of early excess weight gain as the predictor of total GWG, we found that excess first-trimester GWG did not predict total excess GWG, but that the sensitivity of excess second-trimester GWG for excess total GWG was high across BMI categories.