Metformin versus insulin in the management of gestational diabetes mellitus: A meta‑analysis / Philippine Journal of Obstetrics and Gynecology

Objective@#To determine the efficacy of metformin and insulin in the management of gestational diabetes mellitus (GDM). @*Methodology@#Randomized controlled trials (RCT) were retrieved from the databases. All references cited in the articles were also searched by hand to identify additional publications. Studies included were limited to trials on metformin and insulin in the management of GDM in singleton pregnancies. Four RCTs were analyzed in the study. The risk of bias was assessed using Preferred Reporting Items for Systematic reviews and Meta-Analyses Cochrane Collaboration’s tool (Rob 2). Random effects meta-analysis was carried out to pool the data. All analyses were conducted in Review Manager 5.3.5 (2014). @*Results@#Meta-analysis of four RCT involving 807 participants (405 were treated with metformin and 402 were treated with insulin) shows that there was no significant difference between metformin and insulin in achieving glycemic control as to fasting blood sugar (FBS), postprandial blood glucose (PPBG), and glycosylated hemoglobin, mean difference (MD) −0.43 (95% confidence interval [CI] −2.77–1.91; P = 0.72), MD −2.13 (95% CI −5.16–0.90, P = 0.17), MD −0.09 (95% CI −0.20–0.02, P = 0.10), respectively. For maternal outcomes, there was a statistically significant 69% decreased risk of hypoglycemia in the metformin group (risk ratio [RR] 0.31, 95% CI 0.20–0.49; P < 0.001). There was no difference in terms of risk of preterm birth (RR 1.11, 95% CI 0.75–1.64, P = 0.60); hypertensive disorders (RR 1.06, 95% CI 0.71–1.60, P = 0.77); polyhydramnios (RR 1.04, 95% CI 0.51–2.14, P = 0.91); and risk of cesarean delivery (RR 0.90, 95% CI 0.75–1.08, P = 0.27). For neonatal outcomes, there was statistically significant 34% reduction on the risk of neonatal hypoglycemia (RR 0.66, 95% CI 0.46–0.94; P = 0.02) in the metformin group. There was no statistical difference in terms of mean birthweight (MD − 81.34, 95% CI −181.69–19.02, P = 0.11). Metformin has decreased the risk of newborns weighing more than 4000 g, babies with birthweight >90th percentile by 27% (RR 0.73, 95% CI 0.28–1.90, P = 0.52), and 20% (RR 0.80, 95% CI 0.54–1.18,P = 0.26), respectively, but these were not statistically significant. There was no significant difference in terms of risk of birthweight <10th percentile (RR 1.17, 95% CI 0.60–2.31, P = 0.65); APGAR <7 (RR 1.17, 95% CI 0.65–2.08, P = 0.60), birth trauma (RR 0.77, 95% CI 0.23–2.58, P = 0.67), and jaundice requiring phototherapy RR 1.04, 95% CI 0.66–1.65, P = 0.85). Neonatal intensive care unit admission (RR 0.89, 95% CI 0.64–1.23, P = 0.48), respiratory distress syndrome (RR 0.73, 95% CI 0.36–1.50, P = 0.39), transient tachypnea (RR 0.78, 95% CI 0.27–2.19, P = 0.63), and any congenital anomaly (RR 0.58, 95% CI 0.20–1.67, P = 0.31) were decreased in the metformin group but was not statistically significant. @*Conclusion@#There was no significant difference between metformin and insulin in achieving glycemic control as to FBS and PPBG among patients with GDM. There was a statistically significant reduction in the risk of maternal and neonatal hypoglycemia in the use of metformin.

Enhancing gestational diabetes management in Filipino patients: Evaluating the impact of education on knowledge, attitude, and pregnancy outcomes at a Tertiary Medical Center

Introduction@#Patient education is integral in the management of gestational diabetes mellitus (GDM), a common pregnancy complication that may cause adverse perinatal outcomes. This study evaluated the effect of diabetes education on the knowledge and attitude among patients with GDM, comparing pre- vs post-diabetes session scores and determining pregnancy outcomes.@*Methodology@#A one-group pre-test and post-test experimental design study was conducted on 75 patients after one- session diabetes counseling using the Gestational Diabetes Mellitus Knowledge Questionnaire (GDMKQ) and the third version of the Diabetes Attitude Scale (DAS-3).@*Results@#Of the 75 subjects, 84% exhibited adequate knowledge of diabetes. Post-education, a significant increase in the total scores was seen among those less than 35 years of age (p-value: 0.003), both employed and unemployed (p-value: 0.0.026, 0.047, respectively), with a secondary level of education (p-value: 0.014) and multigravid (p-value: 0.015). An overall median positive attitude score of 3.6 was documented. For neonatal outcomes, no adverse events existed. For maternal outcomes, 17.9% had elevated fasting blood glucose while 7.1% had elevated 2-hour post-glucose tolerance test.@*Conclusion@#Diabetes education improves patient’s knowledge but not their attitude. Hence, improvement in attitude interventions should be incorporated into the current diabetes education program.

Desfechos neonatais adversos e fatores associados entre gestantes com diabetes mellitus gestacional e de risco habitual / Neonatal adverse outcomes and associated factors among pregnant women with gestational and usual risk of diabetes mellitus

Objetivo: Avaliar os desfechos neonatais adversos e fatores associados entre gestantes com diabetes mellitus gestacional e de risco gestacional habitual. Métodos: Estudo transversal, de âmbito nacional e de base hospitalar, conduzido entre fevereiro de 2011 e outubro de 2012. Foram excluídas as mulheres com gestações múltiplas ou natimortos. As informações foram coletadas via questionário padronizado, cartão de pré-natal e/ou prontuário. Resultados: Das 12.712 puérperas avaliadas, 1.915 tinham diabetes mellitus gestacional e 10.797 foram classificadas em risco gestacional habitual. Verificou-se que 74,1% das mulheres com diabetes receberam assistência pré-natal adequada/mais que adequada em relação a 65% das mulheres com risco gestacional habitual. Em contrapartida, o grupo das mulheres com diabetes foi composto em sua maioria por mulheres acima de 35 anos, com hipertensão prévia, excesso de peso pré-gestacional e ganho de peso gestacional excessivo, multíparas, com histórico de cesárea e abortos. Os desfechos "prematuridade" e "nascimento de recém-nascido grande para idade gestacional" foram superiores entre as mulheres com diabetes. Conclusão: As mulheres com diabete detiveram condições demográficas, antecedentes clínicos/obstétricos e desfechos neonatais mais desfavoráveis em relação às mulheres de risco gestacional habitual. Apesar disso, o pré-natal foi um dos fatores que exerceu extrema importância para que outros desfechos negativos (óbito neonatal e o Apgar<5) não fossem superiores entre as mulheres com diabete sem relação às de risco gestacional habitual. Portanto, reitera-se o papel do pré-natal entre as mulheres brasileiras, sobretudo as de alto risco gestacional.

Objective: To assess adverse neonatal outcomes and associated factors between pregnant women with gestational diabetes mellitus and usual gestational risk. Methods: Cross-sectional, nationwide, hospital-based study, conducted from February 2011 to October 2012. Women with multiple pregnancies or stillbirths were excluded. Information was collected using a standardized questionnaire, prenatal card and/or medical records. Results: Out of a total of 12,712 postpartum women evaluated, 1,915 had gestational diabetes mellitus and 10,797 were classified as usual gestational risk. It was observed that 74.1% of diabetics received adequate/more than adequate prenatal care compared to 65% of women with usual gestational risk. On the other hand, the group of diabetics was composed mostly of women over 35 years of age, with underlying hypertension, pre-gestational excess weight and excess gestational weight gain who were multiparous, with history of cesarean deliveries and abortions. The outcomes of "prematurity" and "birth of large-sized newborn" for the gestational age were higher among diabetics. Conclusion: Diabetic women had more unfavorable demographic conditions, clinical/obstetric history and neonatal outcomes compared to women with usual gestational risk. Nevertheless, prenatal care was a factor of extreme importance to prevent other negative outcomes (neonatal death and Apgar <5) to increase among diabetic women compared to those with usual gestational risk. Therefore, the role of prenatal care among Brazilian women is reiterated, especially among the high gestational risk women.

Características de la descendencia de gestantes diabéticas atendidas en el Hospital "Comandante Ciro Redondo García", Artemisa / Characteristics of the Offspring of Pregnant Women Who Received Attention in the Hospital Comandante Ciro Redondo García, of Artemisa

Introducción: Múltiples investigaciones demuestran el efecto teratogénico de la diabetes mellitus durante el embarazo, considerada causa frecuente de morbilidad fetal. Objetivo: Describir las características del producto de la concepción de mujeres con diabetes pregestacional o gestacional, atendidas en el Hospital Provincial Comandante Ciro Redondo García, de Artemisa. Métodos: Se realizó un estudio observacional, descriptivo, transversal, en la Provincia Artemisa, Cuba, en el período de febrero 2016 a febrero 2018, en 316 mujeres con diabetes mellitus durante su gestación. La información se obtuvo mediante revisión documental y entrevista, conservando los datos en hoja de cálculo Excel. Resultados: El 69,9 por ciento de las pacientes diabéticas estudiadas presentaron morbilidades en su descendencia, entre las que predominaron los defectos congénitos en 139 casos; 34 neonatos macrosómicos; 21 pretérminos; 9 con retardo del crecimiento intrauterino y 5 fallecidos antes del año de vida. La diabetes, tanto pregestacional como gestacional, se relacionó con afecciones en la descendencia; sin embargo, un control preconcepcional adecuado de la enfermedad redujo el riesgo de tener hijos afectados. Los defectos congénitos fueron la alteración más frecuente cuando la madre padecía diabetes pregestacional. Si la diabetes materna era gestacional los hijos presentaron con frecuencia macrosomía y otras anomalías asociadas. Conclusiones: Alrededor de 70 de cada 100 mujeres diabéticas presentan morbilidades en su descendencia. Si la diabetes materna no es controlada antes de la concepción, estas morbilidades en sus hijos son predominantemente defectos congénitos con posible origen disruptivo, mientras que la diabetes gestacional se relaciona más con recién nacidos macrosómicos(AU)

Introduction: Multiple investigations show the teratogenic effect of diabetes mellitus during pregnancy, being considered a frequent cause of fetal morbidity. Objective: To describe the characteristics of the offspring of women with pregestacional or gestational diabetes who received attention at the Hospital Provincial Comandante Ciro Redondo García of Artemisa. Methods: An observational, descriptive, cross-sectional and descriptive study was conducted in Artemisa Province, Cuba, in the period from February 2016 to February 2018, with 316 pregnant women with diabetes mellitus. The information was obtained through documentary review and interview; the data were kept in an Excel spreadsheet. Results: 69.9 percent of the studied diabetic patients presented morbidities in their offspring, among which congenital defects predominated, accounting for 139 cases; 34 were macrosomic neonates; 21 were preterm; 9 presented intrauterine growth retardation; and 5 died within one year of life. Diabetes, both pregestational and gestational, was associated with conditions in the offspring; however, adequate preconception control of the disease reduced the risk for having affected children. Congenital defects were the most frequent alteration when the mother had pregestational diabetes. If maternal diabetes was gestational, the offspring frequently presented macrosomia and other associated anomalies. Conclusions: About 70 out of 100 diabetic women present morbidities in their offspring. If maternal diabetes is not controlled before conception, these morbidities in their offspring are predominantly congenital defects with a possible disruptive origin, while gestational diabetes is more related to macrosomic newborns(AU)

Factores de riesgo psicosocial asociados con la diabetes mellitus gestacional: revisión sistemática / Psychosocial risk factors associated with gestational diabetes mellitus: systematic review

La diabetes mellitus gestacional DMG es una enfermedad con consecuencias mortales, incapacitantes y costosas para las personas, las familias, las comunidades y los países. Con el fin de establecer de manera sistemática los factores de riesgo psicosocial asociados con la DMG que deberían ser monitoreados durante y después del embarazo se realizó una revisión sistemática en las bases de datos PubMed/Medline y Cochrane. Se encontraron 1188 artículos y se seleccionaron 41. Algunos temas principales fueron conflictos con prácticas culturales, estigma social, influencia de la etnia/raza, bajo nivel educativo, calidad del sueño, problemas con la lactancia materna, preocupación por la propia salud o la del bebé, baja percepción de riesgo de DMG o de diabetes mellitus tipo 2 en el futuro, estrés, ansiedad y depresión, conocimiento limitado, falta de apoyo de la pareja, de la familia o social y de los profesionales de la salud, bajos niveles de autocuidado/autoeficacia y dificultades con cambios en el estilo de vida. Estos factores deberían monitorearse en las embarazadas durante y después del parto. Los tratamientos deberían considerar el impacto psicológico y el riesgo de desarrollar diabetes mellitus tipo 2 después del parto, y deberían ser incluidos en las guías de práctica clínica. Las poblaciones multiétnicas y los grupos más vulnerables demográficamente y socioeconómicamente son más susceptibles de desarrollar DMG.

Gestational diabetes mellitus (GDM) is a disease with fatal, disabling, and costly consequences for individuals, families, communities and countries. To systematically establish the psychosocial risk factors associated with GDM that should be monitored during and after pregnancy. Systematic review in PubMed/Medline and Cochrane databases. 1188 articles were found and 41 were selected. Some main themes were conflicts with cultural practices, social stigma, ethnicity/race influence, low educational level, sleep quality, breastfeeding problems, concern for ones own health/baby, low perception of the risk of GDM/DM2 in the future, stress, anxiety and depression, limited knowledge, lack of support from the partner/family/social and health professionals, low levels of self-care/self-efficacy and difficulties with changes in the lifestyle. These factors should be monitored in pregnant women during and after delivery. Treatments should consider the psychological impact and the risk of developing DM2 after childbirth and should be included in clinical practice guidelines. Multi-ethnic populations and the most demographically and socioeconomically vulnerable groups are more susceptible to developing GDM.

Biochemical analysis of oxidative stress and purinergic system in pregnant women with gestational diabetes mellitus / Análise bioquímica do estresse oxidativo e do sistema purinérgico em gestantes com diabetes mellitus gestacional

Background: Pregnancy is characterized as a physiological period with greater sensitivity to insulin resistance and changes in oxidative stress. Purinergic signaling is directly related to diabetes, as this condition modifies the concentration of extracellular ATP and the level of degradation of ATP to adenosine. Objective: Analyze oxidative stress and the purinergic system in pregnant women with Gestational Diabetes Mellitus (GDM) and compare them with low-risk pregnant women (LR). Materials and Methods: The research was of a quantitative approach of an experimental nature. The study was carried out at the Clínica da Mulher, which serves high-risk pregnant women, and at the Family Health Centers, which serves low-risk pregnant women, both located in Chapecó, Santa Catarina, Brazil. Results: From the analysis, it was observed that oxidative stress was increased in pregnant women in LR compared to pregnant women with GDM by increasing the concentration of TBARS and reducing the concentration of Carbonyl Protein in pregnant women with LR. Regarding the purinergic system, there was a significant decrease in the hydrolysis of the nucleotides ATP, ADP, and AMP in pregnant women with GDM, and a significant increase in the hydrolysis of ADA, also in pregnant women with GDM. Conclusion: Therefore, pregnant women with GDM have less oxidative stress compared to pregnant women in LR concerning TBARS and Carbonyl Protein markers, thus allowing a greater antioxidant defense mechanism. Furthermore, concerning the purinergic system, there is an increase in the activity of ADA, which is directly related to the immunosuppression process, a necessary condition for the protection of the fetus during the gestational period (AU).

Introdução: A gravidez é caracterizada como um período fisiológico em que há uma maior sensibilidade a resistência à insulina e alterações no estresse oxidativo. A sinalização purinérgica está diretamente relacionada ao diabetes, pois esta condição modifica a concentração de ATP extracelular e o nível de degradação de ATP em adenosina. Objetivo:Analisar o estresse oxidativo e o sistema purinérgico em gestantes com Diabetes Mellitus Gestacional (DMG) e compará-los com gestantes de baixo risco (BR). Materiais e Métodos: A pesquisa foi de abordagem quantitativa, de caráter experimental. O estudo foi realizado na Clínica da Mulher, que atende gestantes de alto risco, e nas Unidades de Saúde da Família, que atendem gestantes de baixo risco, ambas localizadas no município de Chapecó, Santa Catarina, Brasil. Resultados: A partir das análises, observou-se que o estresse oxidativo apresentou-se aumentado em gestantes de BR quando comparado a gestantes com DMG. No que tange ao sistema purinérgico, houve uma diminuição significativa na hidrólise dos nucleotídeos ATP, ADP e AMP em gestantes com DMG, bem como um aumento significativo na hidrólise de ADA, também em gestantes com DMG. Conclusão: Portanto, gestantes com DMG possuem menor estresse oxidativo quando comparado a gestantes de BR, permitindo assim, um maior mecanismo de defesa antioxidante. Para mais, no que se refere ao sistema purinérgico, verifica-se o aumento da concentração de ADA está diretamente relacionada ao processo de imunossupressão, condição necessária à proteção do feto durante o período gestacional (AU).

Quality of Life and Depression Conditions of Women with Gestational Diabetes during Pregnancy and Postpartum Period / Qualidade de vida e condições de depressão em mulheres com diabetes gestacional durante a gravidez e o período pós-parto

Abstract Objective The study was conducted to determine the quality of life and depression of women with gestational diabetes during pregnancy and the postpartum period. Methods 100 pregnant women with gestational diabetes and 100 healthy pregnant women were included in the present study. Data were obtained from pregnant women in their third trimester who agreed to take part in the study. The data was collected during the third trimester and six to eight weeks after the baby was born. The data were obtained by socio-demographic characteristics form, postpartum data collection form, the MOS 36 Item Short Form Health Survey and Center for Epidemiologic Studies Depression Scale (CESD). Results The mean age of pregnant women with gestational diabetes in the study was the same as the average age of healthy pregnant women. The CESD score of pregnant women with gestational diabetes was 26,77 ± 4,85 while the corresponding score was 25,19 ± 4,43 for healthy women. Additionally, the score in the postpartum period was 32.47 ± 5.94 for pregnant women with gestational diabetes and 35.47 ± 8.33 for healthy pregnant women. CESD scores were found to be higher than the cut-off score of 16 in both groups, and the mean scores increased during the postpartum period. Conclusion During the postpartum period, the quality of life of pregnant women with gestational diabetes was affected more negatively than healthy pregnant women. Depressive symptoms of women with both gestational diabetes and healthy pregnancy were found to be high in pregnancy and postpartum periods.

Resumo Objetivo O estudo foi realizado para determinar a qualidade de vida e depressão de mulheres com diabetes gestacional durante a gravidez e período pós-parto. Métodos 100 gestantes com diabetes gestacional e 100 gestantes saudáveis incluídas no presente estudo. Os dados foram obtidos de mulheres grávidas no terceiro trimestre que concordaram em participar do estudo. Os dados foram coletados durante o terceiro trimestre e seis a oito semanas após o nascimento do bebê. Os dados foram obtidos por meio do formulário de características sociodemográficas formulário de coleta de dados pós-parto MOS 36 Item Short Form Health Survey e Center for Epidemiologic Studies Depression Scale (CESD). Resultados A idade média das gestantes com diabetes gestacional no estudo foi igual à idade média das gestantes saudáveis. O escore CESD de gestantes com diabetes gestacional foi de 26 77 ± 4 85 enquanto o escore correspondente foi de 25 19 ± 4 43 para mulheres saudáveis. Além disso o escore no pós-parto foi de 32 47 ± 5 94 para gestantes com diabetes gestacional e 35 47 ± 8 33 para gestantes saudáveis. Os escores do CESD foram maiores do que o ponto de corte de 16 em ambos os grupos e os escores médios aumentaram durante o período pós-parto. Conclusão Durante o período pós-parto a qualidade de vida de gestantes com diabetes gestacional foi mais afetada negativamente do que gestantes saudáveis. Os sintomas depressivos de mulheres com diabetes gestacional e gravidez saudável foram elevados na gravidez e nos períodos pós-parto.

Maternal and neonatal outcomes among women with gestational diabetes mellitus treated with metformin in a tertiary hospital: A retrospective cohort study

Background@#Gestational diabetes mellitus (GDM) is a common disorder associated with both maternal and fetal complications. Treatment for GDM requires lifestyle modification, as well as insulin and oral anti-diabetes medications to prevent unwarranted fetal and maternal outcomes.@*Objective@#To determine the feto-maternal outcomes of GDM patients treated with either metformin-monotherapy, insulin- monotherapy, and with insulin plus metformin (combination) therapy in a private tertiary hospital in Metro Manila.@*Methods@#This is a retrospective cohort study involving 209 GDM patients admitted from January 2017 to December 2019. Census and chart reviews were done for demographic and clinical data. These were divided into 3 groups: metformin-monotherapy, insulin-monotherapy, and combination treated groups. Analysis of Variance was used to compare the average capillary blood glucose (CBG) levels of patients. Chi-square and Fisher’s Exact tests were used for nonparametric data.@*Results@#Birthweight was significant across all groups: metformin-monotherapy group highest with large-for-gestational- age (LGA) at 25%, small-for-gestational-age (SGA) highest on the insulin-monotherapy group (11.3%) and appropriate-for- gestational-age (AGA) highest in the combination therapy group (84.6%). Age of gestation (AOG) at delivery (p=0.005), maternal CBG during labor (p=0.007), and chronic hypertension (p=0.001) were statistically significant across all groups. Multiple comparisons showed the following statistically significant results as well: chronic hypertension between metformin and combination group (p <0.01), AOG during delivery between metformin vs insulin group (p=0.004), maternal CBGs during labor between metformin vs insulin group (p=0.022), and insulin vs combination treatment group (p=0.029). Average maternal CBG levels were also showed statistically significant difference between the metformin vs insulin group (p=0.029).@*Conclusion@#Metformin may be used in controlling CBG levels in GDM patients. Although metformin may be comparable to insulin, more long-term studies need to be done to determine its long-term effects on neonates.

The efficacy and safety of myo-inositol supplementation for the prevention of gestational diabetes mellitus in overweight and obese pregnant women: A systematic review and meta-analysis / Journal of the ASEAN Federation of Endocrine Societies

Background@#Myo-inositol has emerged as one of the preventive therapies for the development of gestational diabetes mellitus in at-risk populations. This systematic review and meta-analysis was conducted to determine the efficacy and safety of myo-inositol in decreasing the incidence of gestational diabetes in overweight and obese pregnant women.@*Methodology@#This meta-analysis was conducted using the standard Cochrane methodology and reported in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-analyses (PRISMA) 2020 guidelines. Inclusion criteria were randomized controlled trials (RCTs) that enrolled overweight and obese pregnant women and used myo-inositol supplementation. The primary outcome was the incidence of gestational diabetes mellitus at 24-28 weeks. Secondary outcomes included cesarean section rate, the incidence of pregnancy-induced hypertension, macrosomia and preterm delivery. Risk ratios (RRs) and 95% confidence intervals (CIs) were used for dichotomous data.@*Results@#Six RCTs were included. Compared to standard micronutrient supplementation, standard dose of myo-inositol (4 g) may reduce the incidence of GDM (RR 0.54; CI [0.30, 0.96]; n = 887 women), but the certainty of evidence is low to very low. With low-dose myo-inositol however, evidence is uncertain about its benefit on the incidence of gestational diabetes mellitus in overweight and obese women with RR 0.71; CI [0.14, 3.50]. No adverse effects were noted. For the secondary outcomes, standard dose myo-inositol appears to reduce the incidence of pregnancy-induced hypertension and preterm delivery, but the certainty of evidence is low to very low.@*Conclusion@#Current evidence is uncertain on the potential benefit of myo-inositol supplementation in overweight and obese pregnant women. While studies show that 4 g myo-inositol per day may decrease the incidence of GDM, pregnancy-induced hypertension and pre-term birth with no associated risk of serious adverse events, the certainty of evidence is low to very low. Future high-quality trials may provide more compelling evidence to support practice recommendations.

Relationships between hypertensive disorders in pregnancy and obstructive sleep apnea syndrome / 中华妇产科杂志

Objective: To investigate the impact of obstructive sleep apnea syndrome (OSAS) on pregnancy outcomes, especially the relationship between OSAS and hypertensive disorders in pregnancy (HDP). Methods: A total of 228 pregnant women with high risk of OSAS who underwent sleep monitoring during pregnancy in Peking University People's Hospital from January 2021 to April 2022 were collected by reviewing their medical records for retrospective analysis. According to the diagnosis of OSAS, the pregnant women were divided into OSAS group (105 cases) and non-OSAS group (123 cases). The non-parametric Mann-Whitney U test, χ2 test or Fisher's exact test were used to compare the general data and maternal and fetal outcomes between the two groups, and the occurrence of each type of HDP was further compared. Results: (1) Compared with the non-OSAS group, the median pre-pregnancy body mass index (23.6 vs 27.6 kg/m2) and the proportion of snoring [28.9% (33/114) vs 59.2% (61/103)] in the OSAS group were higher, and the differences were both statistically significant (both P<0.001). (2) The incidence of HDP [67.6% (71/105) vs 39.0% (48/123)] and gestational diabetes mellitus [GDM; 40.0% (42/105) vs 26.8% (33/123)] of pregnant women in the OSAS group were higher than those in the non-OSAS group, and the median delivery week was shorter than that in the non-OSAS group (38.4 vs 39.0 weeks). The differences were all statistically significant (all P<0.05). Between-group differences for the delivery way, postpartum hemorrhage, the rate of intensive care unit admission, preterm birth, small for gestational age infants, neonatal asphyxia, the rate of neonatal intensive care unit admission, newborn birth weight and the proportion of umbilical artery blood pH<7.00 were not statistically significant (all P>0.05). (3) Compared with the non-OSAS group, the incidence of chronic hypertension [11.4% (14/123) vs 22.9% (24/105)] and chronic hypertension with superimposed pre-eclampsia [11.4% (14/123) vs 30.5% (32/105)] were higher in the OSAS group, and the differences were both statistically significant (both P<0.01). Conclusion: OSAS is related to HDP (especially chronic hypertension and chronic hypertension with superimposed pre-eclampsia) and GDM, which could provide a practical basis for the screening, diagnosis and treatment of OSAS in pregnant women at high risk.

Role of melatonin receptor 1B gene polymorphism and its effect on the regulation of glucose transport in gestational diabetes mellitus / 浙江大学学报（英文版）（B辑：生物医学和生物技术）

Melatonin receptor 1B (MT2, encoded by the MTNR1B gene), a high-affinity receptor for melatonin, is associated with glucose homeostasis including glucose uptake and transport. The rs10830963 variant in the MTNR1B gene is linked to glucose metabolism disorders including gestational diabetes mellitus (GDM); however, the relationship between MT2-mediated melatonin signaling and a high birth weight of GDM infants from maternal glucose abnormality remains poorly understood. This article aims to investigate the relationship between rs10830963 variants and GDM development, as well as the effects of MT2 receptor on glucose uptake and transport in trophoblasts. TaqMan-MGB (minor groove binder) probe quantitative real-time polymerase chain reaction (qPCR) assays were used for rs10930963 genotyping. MT2 expression in the placenta of GDM and normal pregnant women was detected by immunofluorescence, western blot, and qPCR. The relationship between MT2 and glucose transporters (GLUTs) or peroxisome proliferator-activated receptor γ (PPARγ) was established by western blot, and glucose consumption of trophoblasts was measured by a glucose assay kit. The results showed that the genotype and allele frequencies of rs10830963 were significantly different between GDM and normal pregnant women (P<0.05). The fasting, 1-h and 2-h plasma glucose levels of G-allele carriers were significantly higher than those of C-allele carriers (P<0.05). Besides, the protein and messenger RNA (mRNA) expression of MT2 in the placenta of GDM was significantly higher than that of normal pregnant women (P<0.05). Melatonin could stimulate glucose uptake and GLUT4 and PPARγ protein expression in trophoblasts, which could be attenuated by MT2 receptor knockdown. In conclusion, the rs10830963 variant was associated with an increased risk of GDM. The MT2 receptor is essential for melatonin to raise glucose uptake and transport, which may be mediated by PPARγ.

Factors influencing thrombelastography in pregnancy / 中南大学学报(医学版)

OBJECTIVES@#The number of gestational women has been increased in recent years, resulting in more adverse pregnancy outcomes. It is crucial to assess the coagulation function of pregnant women and to intervene in a timely manner. This study aims to analyze the influencing factors on thrombelastography (TEG) and explore the evaluation of TEG for gestational women.@*METHODS@#A retrospective study was conducted on 449 pregnant women who were hospitalized in the obstetrics department in Xiangya Hospital of Central South University from 2018 to 2020. We compared the changes on the TEG parameters among normal pregnant women between different age groups, different ingravidation groups, and different stages of pregnancy groups. The influence on TEG of hypertensive disorders in pregnancy (HDP) and gestational diabetes mellitus (GDM) as well as two diseases synchronization was explored.@*RESULTS@#Compared with the normal second trimester women, the R values and K values of TEG were increased, and α angle, CI values and LY30 values were decreased in third trimester women (all P<0.05). Compared with normal group, the R values and CI values of TEG of the HDP group have significant difference (both P<0.05). There were no significant difference of TEG between the GDM group, the HDP combined with GDM group and the normal group (all P>0.05). Multiple linear regression analysis showed that the influencing factors for R value in TEG were weeks of gestation (P<0.001) and mode of conception (P<0.05), for α angle was weeks of gestation (P<0.05), for MA value was mode of conception (P<0.05), and for CI value was weeks of gestation (P<0.05). The analysis of correlation between TEG with platelet (PLT) and coagulation routines represented that there was a correlation between TEG R values and activated partial thromboplastin time (APTT) (P<0.01), and negative correlation between TEG CI values and APTT (P<0.05). There was a negative correlation between TEG K values and FIB (P<0.05). The correlation of α angle (P<0.05), MA values (P<0.01) and CI values (P<0.05) with FIB were positive respectively.@*CONCLUSIONS@#The TEG parameters of 3 stages of pregnancy were different. The different ingravidation approach has effect on TEG. The TEG parameters were consistent with conventional coagulation indicators. The TEG can be used to screen the coagulation status of gestational women, recognize the abnormalities of coagulation and prevent the severe complication timely.

Association between gestational diabetes mellitus and preterm birth subtypes / 中华流行病学杂志

Objective: To investigate the association between gestational diabetes mellitus (GDM) and preterm birth subtypes. Methods: Based on the cohort of pregnant women in Anqing Prefectural Hospital, the pregnant women who received prenatal screening in the first or second trimesters were recruited into baseline cohorts; and followed up for them was conducted until delivery, and the information about their pregnancy status and outcomes were obtained through electronic medical record system and questionnaire surveys. The log-binomial regression model was used to explore the association between GDM and preterm birth [iatrogenic preterm birth, spontaneous preterm birth (preterm premature rupture of membranes and preterm labor)]. For multiple confounding factors, the propensity score correction model was used to compute the adjusted association. Results: Among the 2 031 pregnant women with a singleton delivery, the incidence of GDM and preterm birth were 10.0% (204 cases) and 4.4% (90 cases) respectively. The proportions of iatrogenic preterm birth and spontaneous preterm birth in the GDM group (n=204) were 1.5% and 5.9% respectively, while the proportions in non-GDM group (n=1 827) were 0.9% and 3.2% respectively, and the difference in the proportion of spontaneous preterm birth between the two groups was significant (P=0.048). Subtypes of spontaneous preterm were further analyzed, and the results showed that the proportions of preterm premature rupture of membranes and preterm labor in the GDM group were 4.9% and 1.0% respectively, while the proportions in the non-GDM group were 2.1% and 1.1% respectively. It showed that the risk of preterm premature rupture of membranes in GDM pregnant women was 2.34 times (aRR=2.34, 95%CI: 1.16-4.69) higher than that in non-GDM pregnant women. Conclusions: Our results showed that GDM might increase the risk of preterm premature rupture of membranes. No significant increase in the proportion of preterm labor in pregnant women with GDM was found.

New research advances in the prospective cohort study of gestational diabetes mellitus / 中华预防医学杂志

Gestational diabetes mellitus (GDM) is associated with an increased risk of suffering diverse adverse pregnancy outcomes, threating maternal and child health seriously, with an increasing incidence rate year by year. However, the exact cause of GDM is still unknown. Prospective cohort studies obtain data through follow-up, which is helpful to clarify the causal relationship, so as to draw more accurate and reliable conclusions. In recent years, numerous prospective cohort studies on the GDM have emerged. This article elaborates along the occurrence and development process of GDM, in order to provide useful reference for the establishment of relevant high-quality prospective cohort studies in China.

Myoinositol supplementation in the prevention of gestational diabetes mellitus among high-risk pregnant women: A meta-analysis / Philippine Journal of Obstetrics and Gynecology

Objective@#The objective of the study was to determine the effectiveness of myoinositol (MI) supplementation in the prevention of gestational diabetes mellitus (GDM) among high-risk patients.@*Materials and Methods@#Comprehensive and systemic online searches were performed on PubMed, MEDLINE, Ovid, and Cochrane. Cross-referencing from related articles was also done. Only studies published in English were included in the study. We selected all randomized controlled trials on MI and singleton pregnant women with high risk for GDM.@*Data Collection and Analysis@#Five randomized controlled trials were evaluated by two independent reviewers. For each comparison, the quality of evidence was assessed using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses Cochrane Collaboration tool. Review Manager 5.3 was used to generate the risk of bias evaluation and the analysis of the results.@*Main Results@#The present study identified five randomized controlled trials involving 871 participants. The comparison of the studies showed a statistically significant reduction in the incidence of GDM in MI supplementation versus the control group (odds ratio [OR] = 0.32, 95% confidence interval [CI] = 0.19–0.53, P = 0.0001, Z = 4.36) by 68%. Similarly, there is a greater reduction in the incidence of fetal macrosomia among patients in the MI group than the controlled group (OR = 0.24, 95% CI = 0.07–0.78; P = 0.02, Z = 2.36) by 78%. However, there was no difference in terms of incidence of gestational hypertension (OR = 0.61, 95% CI = 0.19–2.01; P = 0.42, Z = −0.81), cesarean section (OR = 0.89, 95% CI = 0.65–1.22; P = 0.47, Z = 0.72), and neonatal hypoglycemia (OR = 0.35, 95% CI = 0.01–8.80; P = 0.53, Z = 0.63) outcomes.@*Conclusion@#MI supplementation taken at 4 g daily would decrease the incidence of GDM and fetal macrosomia. There was no statistically significant reduction in the risk of gestational hypertension, cesarean section, and neonatal hypoglycemia in the supplementation of MI.

Association between maternal gestational diabetes mellitus and the risk of autism spectrum disorder in offspring / 中国当代儿科杂志

OBJECTIVES@#To explore the association between maternal gestational diabetes mellitus (GDM) exposure and the development of autism spectrum disorder (ASD) in offspring.@*METHODS@#A case-control study was conducted, recruiting 221 children with ASD and 400 healthy children as controls. Questionnaires and interviews were used to collect information on general characteristics of the children, socio-economic characteristics of the family, maternal pregnancy history, and maternal disease exposure during pregnancy. Multivariate logistic regression analysis was used to investigate the association between maternal GDM exposure and the development of ASD in offspring. The potential interaction between offspring gender and maternal GDM exposure on the development of ASD in offspring was explored.@*RESULTS@#The proportion of maternal GDM was significantly higher in the ASD group compared to the control group (16.3% vs 9.4%, P=0.014). After adjusting for variables such as gender, gestational age, mode of delivery, parity, and maternal education level, maternal GDM exposure was a risk factor for ASD in offspring (OR=2.18, 95%CI: 1.04-4.54, P=0.038). On the basis of adjusting the above variables, after further adjusting the variables including prenatal intake of multivitamins, folic acid intake in the first three months of pregnancy, and assisted reproduction the result trend did not change, but no statistical significance was observed (OR=1.94, 95%CI: 0.74-5.11, P=0.183). There was an interaction between maternal GDM exposure and offspring gender on the development of ASD in offspring (P<0.001). Gender stratified analysis showed that only in male offspring of mothers with GDM, the risk of ASD was significantly increased (OR=3.67, 95%CI: 1.16-11.65, P=0.027).@*CONCLUSIONS@#Maternal GDM exposure might increase the risk of ASD in offspring. There is an interaction between GDM exposure and offspring gender in the development of ASD in offspring.

Research progress on the relationship between persistent organic pollutants and gestational diabetes / 中华预防医学杂志

Gestational diabetes mellitus(GDM)is one of the common complications during pregnancy. It is associated with many adverse pregnancy outcomes, threatening maternal and child health seriously. The exact pathogenesis of GDM remains unclear. Long term exposure to persistent organic pollutants (POPs) is considered to be one of the risk factors for GDM. More and more studies are concerned about the relationship between them. Based on the literature published at home and abroad, this article summarizes the correlation and possibly related mechanism of POPs and GDM, and explores the correlation between pops and GDM, so as to provide a new idea for the prevention of gestational diabetes.

Research progress on the relationship between air pollution and gestational diabetes / 中华预防医学杂志

Gestational diabetes mellitus (GDM) is one of the most common pregnancy complications and has serious implications for the health of mothers and their offspring. In recent years, studies have confirmed that air pollution is one of the main risk factors for diabetes, and there is increasing evidence that air pollution exposure is closely related to the occurrence of gestational diabetes. However, current studies on the association between air pollutant exposure and the incidence of gestational diabetes are inconsistent, and the window period of pollutant exposure is still unclear. Limited mechanistic studies suggest that airborne particulate matter and gaseous pollutants may affect GDM through multiple mechanisms, including inflammation, oxidative stress, disruption of adipokine secretion, and imbalance of intestinal flora. This review summarizes the relationship between air pollutant exposure and the incidence of GDM in recent years, as well as the possible molecular mechanism of the occurrence and development of GDM caused by air pollutants, in order to provide scientific basis for preventing pollutant exposure, reducing the risk of GDM, improving maternal and fetal outcomes and improving the quality of the birth population.