Obstetrical Outcomes of Amniocentesis or Chorionic Villus Sampling in Dichorionic Twin Pregnancies

BACKGROUND: Under certain situations, women with twin pregnancies may be counseled to undergo invasive prenatal diagnostic testing. Chorionic villus sampling and amniocentesis are the two generally performed invasive prenatal diagnostic tests. Studies comparing procedure-related fetal loss between first-trimester chorionic villus sampling and second-trimester amniocentesis in twin pregnancies are limited. This study aimed to evaluate the procedure-related fetal loss and the obstetrical outcomes of these two procedures, chorionic villus sampling and amniocentesis in twin pregnancies. METHODS: The data from dichorionic-diamniotic twin pregnancies on which first-trimester chorionic villus sampling (n = 54) or second-trimester amniocentesis (n = 170) was performed between December 2006 and January 2017 in a single center were retrospectively analyzed. The procedure-related fetal loss was classified as loss of one or all fetuses within 4 weeks of procedure, and overall fetal loss was classified as loss of one or all fetuses during the gestation. The groups were compared with respect to the procedure-related and obstetrical outcomes. RESULTS: The difference in proportion of procedure-related fetal loss rate (1.9% for chorionic villus sampling vs. 1.8% for amniocentesis; P = 1.000) and the overall fetal loss rate (7.4% for chorionic villus sampling vs. 4.7% for amniocentesis; P = 0.489) between the two groups was not significant. The mean gestational ages at delivery were not statistically significant. CONCLUSION: Both the overall fetal loss rate and the procedure-related fetal loss rate of chorionic villus sampling and amniocentesis in dichorionic twin pregnancies had no statistical significance. Both procedures can be safely used individually.

Ultrasound-guided local injection of methotrexate and systemic intramuscular methotrexate in the treatment of cesarean scar pregnancy

OBJECTIVE: To assess the efficacy and safety of ultrasound-guided intragestational injection of methotrexate (MTX) and systemic intramuscular MTX in the management of cesarean scar pregnancies. METHODS: This was a retrospective case-control study that included women diagnosed with cesarean scar pregnancy at CHA Bundang Medical Center unit between 2009 and 2015. The 26 cases were managed with local injection of MTX under ultrasound guidance and 15 cases were treated with systemic intramuscular of MTX. After the procedure, serial follow-up sonographic examination and serum beta-human chorionic gonadotropin (β-hCG) measurement were performed. RESULTS: The mean initial β-hCG level was 20,610.73 mIU/mL and ranged from 263.00–71,316.50 mIU/mL. Mean gestational age was 6.3 weeks and ranged from 4.8 to 8.5 weeks. The majority of ectopic cases were treated successfully and follow-up β-hCG level declined abruptly following the first dose of MTX. The rate of success of local MTX treatment was significantly higher than that of systemic MTX treatment. It was 93.75% vs. 73.33%, respectively (P < 0.05). CONCLUSION: Ultrasound-guided intragestational injection of MTX is an effective method for the management of cesarean scar pregnancies and is associated with minimal side effects and high treatment success.

A case of acardiac twin pregnancy with fetus survival after successful radiofrequency ablation of umbilical cord / 대한산부인과학회지

Acardiac twin is a rare anomaly that occurs 1% in monochorionic twins and 1 in 35,000 pregnancies overall. Acardiac twin, also known as twin-reversed arterial perfusion (TRAP) sequence, involves a "pump" or donor twin perfusing a recipient or "acardiac" twin through vascular (usually arterial-arterial and venous-venous) anastomoses. Perinatal mortality rate for the pump twin has been reported to be 50~75%, mainly as a result of polyhydramnios, preterm labor, and congestive heart failure. Therefore, occlusion of the circulation to the acardiac twin has been recommended to improve perinatal outcome of the pump twin. Radiofrequency ablation of the acardiac twin effectively protects the pump twin from high-output cardiac failure and death. We report our experience in the treatment of patients with TRAP sequence using radio frequency ablation to stop perfusion to the acardiac twin.

Successful management of cesarean scar pregnancy at 13 weeks of gestation by uterine artery embolization: A case report / 대한산부인과학회지

Cesarean scar pregnancy, in which the pregnancy is implanted at the previous cesarean scar, is a very rare form of ectopic pregnancy. A delay in diagnosis can lead to uterine rupture, massive hemorrhage, and serious maternal morbidity. However, the optimal treatment is unknown. We experienced a case of viable cesarean scar pregnancy diagnosed at 13 weeks of gestation treated with uterine artery embolization and report with a brief of literatures.

Intraligamentary pregnancy managed by laparoscopic operation: A case report / 대한산부인과학회지

Laparoscopic management is the ideal form of treatment for tubal pregnancy, most common type of ectopic pregnancy. Not only abdominal pregnancy including intraligamentary pregnancy is an rare form of ectopic pregnancy, but intraligamentary pregnancies are usually diagnosed and managed by emergency explorative laparotomy. We present the case of an intraligamentary pregnancy of a 28-year-old woman managed by laparoscopic treament without any complication.

Intraligamentary pregnancy managed by laparoscopic operation: A case report / 대한산부인과학회지

Laparoscopic management is the ideal form of treatment for tubal pregnancy, most common type of ectopic pregnancy. Not only abdominal pregnancy including intraligamentary pregnancy is an rare form of ectopic pregnancy, but intraligamentary pregnancies are usually diagnosed and managed by emergency explorative laparotomy. We present the case of an intraligamentary pregnancy of a 28-year-old woman managed by laparoscopic treament without any complication.

Ultrasound-guided local injection of potassium chloride (KCl) and methotrexate (MTX) in the treatment of cornual pregnancy / 대한산부인과학회지

OBJECTIVE: To evaluate efficacy and safety of local injection of potassium chloride (KCl) and methotrexate (MTX) in the treatment of cornual pregnancy. METHODS: We retrospectively reviewed all cases of cornual pregnancy treated conservatively from 2005 through August 2007. Eight cases were identified and two cases were heterotopic interstitial pregnancy. All cases were managed with local injection of KCl or methotrexate under ultrasound guidance and 2 cases were treated with intra-muscular injection of MTX in combination. After the procedure all cases with cardiac activity was confirmed to be aborted by ultrasound. Also serial follow-up sonographic examination and serum beta-hCG measurement were performed. RESULTS: The mean initial beta-hCG level was 53,331.6 mIU/mL and ranged from 14,332 mIU/mL to 125,721 mIU/mL. Mean gestational age was 48.3 days from 40 to 65 days. All cases were aborted successfully and follow up beta-hCG were declined abruptly. Two cases of heterotopic pregnancy resulted in successful deliveries at full term. CONCLUSION: Cornual resection or hysterectomy should no longer be the first line of treatment for hemodynamically stable patients with cornual pregnancy. They can be successfully treated through local injection of MTX or KCl by ultrasound guidance.

One case of monoamniotic twin pregnancy with cord entanglement and fetus survival at 32+4 weeks after successful medical amnioreduction and intensive ultrasound surveillance / 대한산부인과학회지

Monoamniotic twin pregnancies are relatively rare, but perinatal mortality is high about 30-70%. The major cause of fetal death is cord accident, congenital anomalies, twin-twin transfusion syndrome, and intrauterine growth restriction. Especially cord entanglement occurs; perinatal mortality is about 50%. So the active management of monoamniotic twins to reduce the complication of cord entanglement is important. This is a case of monoamniotic twin pregnancy with cord entanglement and both fetuses survival by elective cesarean section at 32+4 weeks after medical amnioreduction and intensive fetal surveillance.

A Case of Fetal Bilateral Renal Agenesis Diagnosed by Transvaginal Ultrasonography / 대한산부인과학회지

Fetal bilateral renal agenesis is a lethal congenital anomaly characterized by bilateral pulmonary hypoplasia, deformities and death due to severe oligohydramnios. This syndrome is associated with malformations of genitourinary tract, cardiovascular system, vertebral bodies or imperforated anus in more than half of the affected individuals. An early and reliable prenatal diagnosis is extremely important because it may offer options for pregnancy termination as early as possible. The criteria for the ultrasonographic diagnosis of bilateral renal agenesis are severe oligohydramnios, nonvisualization of the bladder, empty renal fossae. But poor sonographic resolution of severe oligohydramnios makes it difficult to diagnose the disease. We present a case of bilateral renal agenesis diagnosed at the 18th weeks gestation by using Transvaginal Ultrasonography and Color Doppler.

Ultrasound Screening for Fetal Down Syndrome in the Second Trimester of Pregnancy / 대한산부인과학회잡지

OBJECTIVE: To determine the risk of Down syndrome in fetuses with sonographic markers using the likelihood ratios and individual risk assessment. METHODS: We retrospectively evaluated the midtrimester genetic sonographic features of fetuses with Down syndrome and compared them with euploid fetuses. Patients were referred for an increased risk of aneuploidy and evaluated for the presence of structural defects, a nuchal fold, short long bones, pyelectasis, brachycephaly, small stomach, and hyperechoic bowel. Outcome information included the results of genetic amniocentesis (if performed), the results of pediatric assessment, and follow-up after birth. The sensitivity, specificity, and likelihood ratios for markers ware calculated isolated findings. RESULTS: There were 59 fetuses with Down syndrome and 600 euploid fetuses. The presence of any marker resulted in sensitivity for the detection of Down syndrome of 86.4% with a false-positive rate of 13.6%. Structural defect had a likelihood ratio of 77.8. As an isolated marker, the nuchal fold, short humerus, short femur, echogenic bowel and renal pyelectasia has a likelihood ratio of 20.2, 12.7, 3.9, 2.5, 1.1 respectively. Other isolated markers had low likelihood ratios because of the higher prevalence in the unaffected population. CONCLUSION: Combining second-trimester serum testing and fetal sonography is a feasible approach to Down syndrome screening, compatible with current obstetric practice. Although an isolated marker with a low likelihood ratio may not increase a patient's risk of Down syndrome, the presence of such a marker precludes reducing the risk of aneuploidy. This information will be useful in counseling pregnant women who are at high risk for fetal Down syndrome and who prefer to undergo genetic sonography before deciding about genetic amniocentesis.

Ultrasound Screening for Fetal Down Syndrome in the Second Trimester of Pregnancy / 대한산부인과학회잡지

OBJECTIVE: To determine the risk of Down syndrome in fetuses with sonographic markers using the likelihood ratios and individual risk assessment. METHODS: We retrospectively evaluated the midtrimester genetic sonographic features of fetuses with Down syndrome and compared them with euploid fetuses. Patients were referred for an increased risk of aneuploidy and evaluated for the presence of structural defects, a nuchal fold, short long bones, pyelectasis, brachycephaly, small stomach, and hyperechoic bowel. Outcome information included the results of genetic amniocentesis (if performed), the results of pediatric assessment, and follow-up after birth. The sensitivity, specificity, and likelihood ratios for markers ware calculated isolated findings. RESULTS: There were 59 fetuses with Down syndrome and 600 euploid fetuses. The presence of any marker resulted in sensitivity for the detection of Down syndrome of 86.4% with a false-positive rate of 13.6%. Structural defect had a likelihood ratio of 77.8. As an isolated marker, the nuchal fold, short humerus, short femur, echogenic bowel and renal pyelectasia has a likelihood ratio of 20.2, 12.7, 3.9, 2.5, 1.1 respectively. Other isolated markers had low likelihood ratios because of the higher prevalence in the unaffected population. CONCLUSION: Combining second-trimester serum testing and fetal sonography is a feasible approach to Down syndrome screening, compatible with current obstetric practice. Although an isolated marker with a low likelihood ratio may not increase a patient's risk of Down syndrome, the presence of such a marker precludes reducing the risk of aneuploidy. This information will be useful in counseling pregnant women who are at high risk for fetal Down syndrome and who prefer to undergo genetic sonography before deciding about genetic amniocentesis.

The Distribution of Fetal Nuchal Translucency Thickness in Normal Korean Fetuses

The aim of present study was to establish normative data for the distribution of nuchal translucency (NT) thickness in normal Korean fetuses. The data were collected from pregnant women with singleton pregnancies in whom fetal ultrasound was performed and the fetal NT thickness was measured between 11 and 14 weeks of gestation. Among them, a total of 2,577 fetuses with a known normal outcome were included in this study. The distribution of multiple of median (MoM) values of the NT thickness with crown-rump length (CRL) in 10-mm intervals and the 95th percentile of MoM were calculated with the linear regression method. The present study showed that NT measurements increase with increasing CRL and a false positive rate increases with increasing gestational age. Therefore, a fixed cut-off point through the first trimester was not appropriate and each NT measurement should be examined according to the gestational age. The present study offers normative data of the fetal NT thickness in a Korean population, which can be used as reference for screening chromosomal aberrations or other congenital abnormalities in the first trimester.

Evaluation of Adnexal Mass associated with Pregnancy / 대한산부인과학회잡지

OBJECTIVE: To evaluate patients with adnexal masses that were managed surgically during pregnancy and their effect on fetal outcome. METHODS: The data were reviewed concerning pregnant women who required surgery at Samsung Cheil hospital between January 1996 to December 2001. Among 50,126 deliveries, 255 cases of ovarian tumors were evaluated for clinical aspects, histologic patterns, and obstetrics and fetal outcome. RESULTS: 1. The prevalence of ovarian mass in pregnancy was 0.5% (255 cases in 50,126 deliveries). 14 cases of malignant tumors were founded. 2. The maternal mean age was 28.7+/-3.6 years old, mean gavida was 1.8+/-1.1, and mean parity was 0.3+/-0.5. 3. The mean gestational weeks of diagnosis was 11.9+/-8.6 weeks. Prenatal operations were performed in 160 cases, and 95 cases of ovarian masses were operated at delivery time by cesarean section. 4. In the group of prenatal operation, preterm delivery and caesarian section rate were decreased at operation before 23 gestational weeks (P<0.05). 5. In 42 cases, Emergency operations were done. Mean delivery weeks was 36.7+/-7.2 weeks and was earlier than elective operation group (P<0.05). 6. The mean size of ovarian mass was 9.5+/-3.8 cm. The pathologic features of the 255 lesions were as follows: 98 benign cystic teratomas, 43 mucinous cystadenomas, 31 endometriomas, 20 serous cystadenomas, 14 simple cysts, 14 paraovarian cysts, 6 follicular cysts, 5 corpus luteal cysts, 5 theca luteal cysts, 3 hydrosalpinx, 2 fibromas, and 14 malignant tumors. 7. The 231 patients for whom the outcome of pregnancy was available, 18 (7%) gave birth before 37 weeks of gestation, while 3 (1.2%) experienced spontaneous abortions, 2 artificial abortions, and 1 hysterotomy. CONCLUSION: Most adnexal masses identified by sonography during pregnancy were small, simple cysts that did not pose a risk a pregnancy. However the percentage of malignant tumors or tumors of low malignant potential was 1.8 fold greater than previously reported. Surgical intervention at <23 weeks of gestation might have not been adverse outcomes.

Evaluation of Insulin-like Growth Factor-binding Protein-1 in Cervical Secreation as a Predictor of Preterm Delivery / 대한산부인과학회잡지

OBJECTIVE: This study is performed to assess whether detection of phosphorylated insulin like growth factor binding protein-1 (phIGFBP-1) in cervical secretions by a bed side test could be used to prediction preterm delivery in patient with regular uterine contraction. METHODS: In our prospective study, 42 women between 20.2 and 36.4 weeks gestation with regular, persistent contraction (2-3/min for 30 min). and 27 women between 22.0 and 37.0 weeks of gestation without symptoms of preterm labor were assessed for presence of cervical phIGFBP-1. Dacron swabs were applied to the cervix and assayed in 5min by using immunochromatography, actim partus test (Medix Biochemica). RESULTS: Of the 42 patients with regular uterine contractions, 22 had a positive actim partus test and 20 had a negative test. Among the 22 patients with positive test, 5 delivered preterm and other 17 patients delivered term (<37 weeks). Among the the 20 women with a negative test, 2 delivered preterm (NS). The mean concentration of phIGFBP-1 in 22 positive patients is 83.8+/-86.5 microgram/L and that in 20 negative patients is 2.1+/-5.0 microgram/L (P<0.0001) (Table 4). Sensitivity, specificity, false positive, false negative, positive predictive, and negative predictive values were 18.5, 59.6, 40.3, 28.6, 16.7, and 94.9%, respectively. CONCLUSION: The absence of cervical phIGFBP-1 is seems to be a valuable test in excluding preterm delivery in patients who have regular uterine contractions. The high negative predictive value in this study may enable physicians to prevent over treatment of patients with uterine contractions. Therefore, many unwanted side-effects and complications of potentially hazardous tocolytic therapy can be prevented.

The Rate of Planned Pregnancy and Associated Factors Related to Planned Pregnancy / 대한산부인과학회잡지

OBJECTIVE: To evaluate planned pregnancy rate and associated factors related planned pregnancy. METHODS: We surveyed 1,396 cases from May 2002 to December 2002. The cases were derived from the Maternity school. They filled out questionnaire including planned pregnancy, medico-social-economic status. Then, we assessed the planned pregnancy rate with associated medico-social-economic state, through the prospective study. RESULTS: The planned pregnancy rate is 51.4%. The major factor which affected the planned pregnancy rate is the income of the family. The association with the planned pregnancy rate and the parity, age, and educational attainment of the women are not statistically significant. In unplanned group, exposure to alcohol, X-ray and medication is significantly increased in early pregnancy. CONCLUSION: The planned pregnancy can prevent induced abortion and reduce the birth defects due to early exposure to teratogen. Therefore it is important to make an effort to raise the planned pregnancy rate.

Pregnancy Outcome after Exposure of Suspected Teratogens in Early Pregnancy / 대한산부인과학회잡지

OBJECTIVE: To compare the risk of congenital anomaly after exposure to suspected teratogens in early pregnancy with the known baseline risk to the geneneral population. METHODS: From September 1999 to August 2001, we counseled about the teratogenic risk of the fetus by relevant medical literatures after assessment of type, amount, and time of exposure for 302 pregnant women exposed to suspected teratogens such as drugs, radiation, alcohol, and cigarette smoking. We followed up on the pregnancy outcome with the rate of termination of pregnancy and incidence of congenital anomaly. RESULTS: Among a total of 302 cases, 253 pregnant women (83.8%) delivered, 15 (5%) were aborted spontaneously, 34 (11.3%) were terminated. 297 pregnant women (98.3%) were lastly exposed to drugs in mean 5.3 +/- 0.2 gestational weeks. Medicines taken were gastrointestinal drugs (23%), NSAIDs (18.3%), antibiotics (16.2%), antihistamines (10.8%) in the order of frequency. 74 pregnant women (24.5%) were exposed to radiation in mean 5.1 +/- 0.5 gestational weeks. The mean dose was 234.60 mrem. 113 pregnant women (37.3%) lastly drank alcohol in mean 4.5 +/- 0.4 gestational weeks and the mean amount was 1.55 oz. 36 pregnant women (11.9%) lastly smoked in mean 4.4 +/- 0.3 gestational weeks and the mean amount was 7.3 cigarettes/day. We found structural anomalies in 5 cases (Polydactylyl, Ileal agenesis, Both ear mass, Left ectopic kidney, Meningomyelocele) and 1 chromosomal abnormality case (Trisomy18). CONCLUSION: The rate of fetal structural anomaly was 2% in this study and is not more than baseline risk of general population. Therefore, evidence-based teratogenic risk counseling may prevent unnecessary pregnancy termination.

Clinical Outcomes of Increased Nuchal Translucency in Three Years / 대한산부인과학회잡지

OBJECTIVE: To evaluate the relationship between increased nuchal translucency (NT) and abnormal pregnancy outcomes. METHODS: From January 1999 to December 2001, The 298 fetuses of increased nuchal translucency (>or=2.5 mm) in period of 10-14 weeks gestation were reviewed retrospectively. Amniocentesis and high resolution ultrasonography during second trimester were done for all cases. We analyzed septation within NT, karyotypes, structural anomalies, and adverse pregnancy outcomes such as spontaneous abortion, intrauterine fetal death and preterm delivery. RESULTS: The mean age of the patients was 30.5 +/- 3.5 years. The mean gestational age and CRL were 12.5 +/- 0.95 weeks and 6.5 +/- 1.15 mm. We observed 18 (6%) cases of abnormal karyotypes. 7/46 (15.2%) fetuses with internal septation had abnormal karyotype and 11/252 (4.4%) fetuses without internal septation had abnormal karyotype (p=0.013). Among the 280 fetuses with normal karyotype, 8 (2.8%) fetuses had structural anomalies and 18 (6.4%) fetuses had adverse pregnancy outcomes. The chromosomal abnormality and structural anomaly were significantly increased in the group of nuchal translucency thickness above 3.5 mm (p=0.001). CONCLUSION: Increased nuchal translucency is related with chromosomal abnormality and abnormal pregnancy outcomes.

Changes in Vestibular Nerve Activity Following Acute Hypotension in Rats

The basic mechanism for the excitation of the peripheral vestibular receptors following acute hypotension induced by sodium nitroprusside (SNP) or hemorrhage was investigated in anesthetized rats. Electrical activity of the afferent vestibular nerve was measured after pretreatment with kynurenic acid, an NMDA receptor antagonist. The activity of the vestibular nerve at rest following acute hypotension induced by SNP or simulating hemorrhage was a greater increase than in control animals. The gain of the vestibular nerve with sinusoidal rotation following acute hypotension increased significantly compared to control animals. The acute hypotension induced by SNP or hemorrhage did not change the activity of the afferent vestibular nerve after kynurenic acid injection. These results suggest that acute hypotension produced excitation of the vestibular hair cells via glutamate excitotoxicity in response to ischemia.

The clinical significance of laparoscopic uterosacral nerve ablation (LUNA) in infertile women with pelvic pain and endometriosis / 대한산부인과학회잡지

OBJECTIVE: The aim of this study was to evaluate the efficacy of laparoscopic uterosacral nerve ablation (LUNA) in infertile women with chronic pelvic pain and endometriosis. METHOD: Prospective randomized study was performed in 20 infertile women with endometriosis and chronic pelvic pain, who had undergone of laparoscopic uterosacral nerve ablation at Samsung Cheil hospital between April and September, 1998. Statistical analysis was perfomed using by DBSTAT (ver. 2.0). RESULT: The pelvic pain score of pre-operation was 3.72+/-1.07 (mean+/-SD) and it was significantly decreased to 1.83+/-0.85 at 1 month later and 1.93+/-0.92, 1.69+/-0.60, 1.56+/-0.62, 1.56+/-0.81 each in second, third, fourth and fifth month after operation. There was no correlation between pelvic pain and stage of endometriosis. Pregnancy rate was 65% after LUNA (twelve deliveries, one pregnancy is ongoing at IUP 24 weeks). CONCLUSION: Laparoscopic uterosacral nerve ablation would be effective for infertile women with endometriosis and pelvic pain.

The clinical significance of laparoscopic uterosacral nerve ablation (LUNA) in infertile women with pelvic pain and endometriosis / 대한산부인과학회잡지

OBJECTIVE: The aim of this study was to evaluate the efficacy of laparoscopic uterosacral nerve ablation (LUNA) in infertile women with chronic pelvic pain and endometriosis. METHOD: Prospective randomized study was performed in 20 infertile women with endometriosis and chronic pelvic pain, who had undergone of laparoscopic uterosacral nerve ablation at Samsung Cheil hospital between April and September, 1998. Statistical analysis was perfomed using by DBSTAT (ver. 2.0). RESULT: The pelvic pain score of pre-operation was 3.72+/-1.07 (mean+/-SD) and it was significantly decreased to 1.83+/-0.85 at 1 month later and 1.93+/-0.92, 1.69+/-0.60, 1.56+/-0.62, 1.56+/-0.81 each in second, third, fourth and fifth month after operation. There was no correlation between pelvic pain and stage of endometriosis. Pregnancy rate was 65% after LUNA (twelve deliveries, one pregnancy is ongoing at IUP 24 weeks). CONCLUSION: Laparoscopic uterosacral nerve ablation would be effective for infertile women with endometriosis and pelvic pain.