[Value of second trimester maternal serum sFlt-1, PlGF and their ratio in the prediction of preeclampsia].

OBJECTIVE: To study the value of second trimester maternal serum soluble Fms-like tyrosine kinase 1 (sFlt-1), placenta grouth factor (PlGF) and their ratio in the prediction of preeclampsia. METHODS: In this nested case-control study, we collected second trimester maternal serum samples at 15-20 weeks and 24-28 weeks of gestation from those who developed gestational hypertensive disorders. Maternal serum sFlt-1 and PlGF were measured by electrochemiluminescence immunoassay on an automated platform. The value of sFlt-1, PlGF and their ratio were compared between gestational hypertensive group and the control group. RESULTS: Totally 41 patients with preeclampsia, 44 patients with gestational hypertension and 88 women with normal pregnancy outcomes were included in this study. There was no difference of age, gravidity, parity and preconception body mass index (BMI) between these three groups (P > 0.05) .Gestational week at delivery and neonatal birth weight were different between preeclampsia group and the control group (P < 0.01). The mean value of sFlt-1, PlGF and sFlt-1/PlGF ratio was (1 658 ± 488) µg/L, (141 ± 80) µg/L and 17 ± 9 in preeclampsia group, (1 945 ± 575) µg/L, (143 ± 52) µg/L and 15 ± 6 in gestational hypertension group, and (2 084 ± 741) µg/L, (65 ± 58) µg/L and 16 ± 9 in the control group at 15-20 weeks of gestation. There was no difference of sFlt-1, PlGF value and their ratio among the three groups at 15-20 weeks of gestation (P > 0.05) . The median value of sFlt-1, PlGF and sFlt-1/PlGF ratio were 8 525 µg/L, 35 µg/L and 398.0 in preeclampsia group, 905 µg/L, 336 µg/L and 2.7 in gestational hypertension group, 1 028 µg/L, 477 µg/L and 2.3 in the control group at 24-28 weeks of gestation. The value of sFlt-1, PlGF and their ratio was significantly different between preeclampsia group and the control group at 24-28 weeks of gestation (P < 0.01) . PlGF value was different between gestational hypertension group and the control group (P < 0.01) . The sensitivity and specificity of serum sFlt-1, PlGF and sFlt-1/PlGF ratio at 24-28 weeks of gestation to predict preeclampsia were 93% and 99% for sFlt-1 (cut off value 2 500 µg/L), 92% and 77% for PlGF (cut off value 270 µg/L) , 89% and 99% for sFlt-1/PlGF ratio (cut off value 11) . CONCLUSION: The value of sFlt-1, PlGF and their ratio at 24-28 weeks of gestation was significantly changed before clinical onset of preeclampsia.Use these serum indicators to predict preeclampsia will hopefully provide objective evidence for the management of patients who will develop preeclampsia later.

Noninvasive prenatal testing of fetal aneuploidies by massively parallel sequencing in a prospective Chinese population.

OBJECTIVE: The recently developed noninvasive prenatal test (NIPT) presents a new era of prenatal screening. Previously reported studies were primarily conducted on high-risk and advanced maternal age (AMA) pregnancies. We sought to evaluate the performance of NIPT for detection of fetal aneuploidies in a Chinese cohort of women younger than 35 years old in a prospective clinical setting. METHODS: Maternal plasma samples were sequenced to identify the aneuploidies. The results were compared against the serum screening results and validated by karyotyping through invasive procedures and birth follow-up. RESULTS: A total of 1916 prospectively collected maternal plasma samples were sequenced, among which 73 samples (3.8%) failed the sequencing quality control. Birth follow-up missed 111 samples (5.8%). The remaining 1741 samples were analyzed. Sequencing reported 15 aneuploidy samples, including all the T21, T18, and T13 cases. Sequencing performed moderately in identifying sex chromosome aneuploidies, detecting two out of four samples, with a specificity of 99.88% (95% CI 99.53% to 99.98%). CONCLUSIONS: Noninvasive prenatal detection of common fetal aneuploidies is a more sensitive and specific method than triple maternal serum screening. It has a remarkable low false positive rate and is applicable to women younger than 35 years old.

Management of pregnancy with ankylosing spondylitis.

OBJECTIVE: To discuss the interaction between pregnancy and ankylosing spondylitis, and the management of pregnancy with ankylosing spondylitis. METHODS: Twelve cases of pregnancy with ankylosing spondylitis in Peking Union Medical College Hospital from September 2004 to July 2011 were analyzed retrospectively, focusing on the arteritis condition, pregnancy complications, and outcomes. RESULTS: All the 12 patients had full-term pregnancy. Five cases gave birth naturally, and 7 cases received cesarean section for maternity factors. No adverse pregnancy outcomes were encountered. Waist pain appeared in 2 cases in the second trimester, for both of which medication failed. One of the 2 cases had natural childbirth, while the other maintained pregnancy smoothly to cesarean section. CONCLUSIONS: Pregnancy monitoring can help obtain favorable pregnancy outcomes. Attention should be paid to postpartum change of the illness.

[Management of pregnancy with myasthenia gravis: 7 cases report].

OBJECTIVE: To discuss the interaction of pregnancy and myasthenia gravis (MG) and the management of pregnancy with MG. METHODS: Seven cases of pregnancy with MG in Peking Union Medical College Hospital were analyzed retrospectively, with respect to the therapy of MG, pregnancy complications and outcomes. RESULTS: Totally 38,683 pregnant women were admitted to Peking Union Medical College Hospital between Oct. 1983 and Oct. 2010. Among them there were 9 patients suffered from MG, with the incidence of 0.023%. Two pregnancies were terminated because of personal reasons, and seven continued. (1) Onset of MG: in the 7 cases, 6 were diagnosed before conception, with the mean course of 5.9 years. The other one occurred in the third trimester. (2) MANAGEMENT: all the cases were under close surveillance during pregnancy. Four women took thymectomy before conception, and one of them kept taking medication after surgery. In those who received thymectomy, 3 cases remained stable and 1 case worsened during pregnancy. The latter one took medication at 33 weeks, and continued to full term. MG exacerbated in the other three women who had not undergone thymectomy before conception. Among them, one woman complicated with systemic lupus erythematosus and lupus nephritis delivered the baby at 31 weeks. (3) Delivery and neonatal outcomes: cesarean deliveries were performed in 5 cases and the other two underwent vaginal deliveries. All the newborns were admitted to neonatal intensive care unit for surveillance. There were three smaller than gestational week (SGA) infants. No MG was observed in newborns. CONCLUSIONS: Patients with MG should have an overall evaluation before conception. The course of MG during pregnancy is unpredictable. They may get a promising outcome under the control of a multidisciplinary team including obstetricians and neurologists. Newborns should be carefully monitored for sings of transitory MG in the department of pediatrics.

[Pregnancy outcomes of eight pregnant women with congenital adrenal hyperplasia due to 21-hydroxylase deficiency].

OBJECTIVE: To investigate the clinical features and pregnant outcomes of the pregnant women with congenital adrenal hyperplasia (CAH) 21-hydroxylase deficiency (21-OHD). METHODS: The clinical features, therapies, pregnant outcomes of the pregnant women with 21-OHD were retrospectively reviewed in Peking Union Medical College Hospital, from January 2005 to April 2011. RESULTS: There were 8 pregnant women with 21-OHD including 5 simple virilizing patients and 3 nonclassical 21-OHD women. Eight patients were accepted progestational and prenatal continual lower glucocorticoid treatment. During the gestational period, the dosage of glucocorticoid was adjusted in one pregnancy. The serum level of 17-alpha hydroxyprogesterone (17-OHP) were elevated after pregnancy [(70 ± 38) versus (24 ± 23) nmol/L, P < 0.05]. The fertility and offspring rate of 8 patients was 8/12, the fertility and offspring rate of patients who started treatment at preadolescence was significantly increased (4/5 versus 4/7). Four patients were accepted genital reconstructive surgery (clitorectomy, clitoroplasty, vulvoplasty) before pregnancy. The incidence of GDM was 1/8. All patients selected caesarean at from 37(+6) gestation weeks to 39(+6) gestation weeks. The average newborn birth weight was (3210 ± 447) g, and height was (48 ± 2) cm of 8 neonates, none of them was CAH. CONCLUSIONS: Medical and surgical therapy provides satisfactory fertility and pregnancy outcomes for women with 21-OHD. It is safe to pregnant women with 21-OHD and their fetus in continual lower glucocorticoid treatment. The dosage of glucocorticoid should be carefully adjusted during the pregnancy individually according to serum level of 17-OHP.

[Relationship of adverse pregnancy outcomes and a high risk serum screen for Down syndrome in the second trimester].

OBJECTIVE: To investigate the the relationship of a high risk serum screen for Down syndrome in second trimester and adverse pregnancy outcomes, and to evaluate the predictive value for adverse pregnancy outcomes. METHODS: The tri-marker second trimester maternal serum screening for Down syndrome (alpha-fetoprotein, free beta-hCG and unconjugated estriol) was performed on the pregnant women at Peking Union Medical Hospital from January 2009 to January 2011. The cutoff valvue was 1/270. Pregnancy outcomes were followed up. The general condition and pregnancy complications of the pregnant women with high risk (high-risk group) were compared to that of the pregnant women with low risk (low-risk group); and with 35 years old as a demarcation, the incidences of adverse pregnancy outcomes were calculated in the two groups. RESULTS: (1) A total of 1935 cases were collected. And 1784 cases were with low risk, and 151 cases were with high risk. The difference of weight and gestational age between the two groups was not statistically significant (P > 0.05); the difference of age between the two groups was statistically significant (P < 0.01). (2) Pregnancy complications were found in 791 cases. In high-risk group, the incidences of gestational diaetes mellitus (GDM, 13.9%), neonatal asphyxia (4.0%) and small for gestational age infant (SGA, 4.6%) were higher than that in low-risk group (8.4%, 1.0%, 1.6%), the difference was statistically significant (P < 0.05). The incidences of gestational hypertension disease, premature labor, oligohydramnios, placenta previa, placenta abruption, fetal macrosomia in the two groups was not statistically different (P > 0.05). (3) In 1705 cases aged less than 35 years, 129 cases (7.6%) were GDM, 43 cases (2.5%) were gestational hypertension disease, 61 cases (3.9%) were premature labor; in 230 cases aged 35 years or more, 41 cases (17.8%) were GDM, 12 cases (5.2%) were gestational hypertension disease, 15 cases (6.5%) were premature labor, and the difference between the two groups was statistically significant (P < 0.05). In < 35 years old group, the incidences of GDM, neonatal asphyxia and SGA (12.3%, 4.4%, 5.3%) were higher in the high-risk group than that (7.2%, 0.9%, 1.6%) in the low-risk group, and the difference was statistically significant (P < 0.05). In ≥ 35 years old group, the incidences of GDM, neonatal asphyxia and SGA (18.9%, 2.7%, 2.7%) were slightly higher in the high-risk group than that (17.6%, 1.6%, 1.6%) in the low-risk group, the difference between the two groups was not statistically significant (P > 0.05). CONCLUSIONS: The present study revealed apparent increase in the adverse pregnancy outcomes in women with a high risk of Down syndrome screening test. Advanced age is the most important risk factor for a high risk of Down syndrome screening test and adverse pregnancy outcomes. More attention should be attached to the patients whose age were < 35 years old and with a high risk of Down syndrome screening test.

Expert recommendations for the diagnosis and treatment of iron-deficiency anemia during pregnancy and the postpartum period in the Asia-Pacific region.

Anemia during pregnancy and the postpartum period is commonly caused by iron deficiency and is a significant worldwide issue with severe consequences for both mother and developing fetus. From a worldwide perspective, iron-deficiency anemia (IDA) during pregnancy is highest in the Asia-Pacific region; however, there has been little guidance in this region for safe and effective treatment. An expert panel was convened to develop a concise and informative set of recommendations for the treatment of IDA in pregnant and postpartum women in the Asia-Pacific region. This manuscript provides these recommendations and aims to reduce the morbidity and mortality associated with IDA in pregnant and postpartum women in the Asia-Pacific region. The consensus recommendations define anemia as a hemoglobin (Hb) level <10.5 g/dL during pregnancy and <10 g/dL during the postpartum period, and provide cut-off Hb levels to initiate therapy with oral iron, intravenous iron or red blood cell transfusion.

[Establishment of multiple quantitative fluorescent polymerase chain reaction assay and its application in rapid prenatal diagnosis of common chromosome aneuploidies].

OBJECTIVE: To establish the multiple quantitative fluorescent polymerase chain reaction (QF-PCR) assay and evaluate its clinical application in prenatal diagnosis. METHODS: Totally 170 samples were collected between May 2008 and July 2009 in prenatal center of Peking Union Medical College Hospital; 123 of them were amniotic fluid, 9 were chorionic villous samples, 20 were fetal blood and 18 were villi from aborted fetuses. All samples were from women of Han nationality, with mean age of (34.1 ± 4.6) years old, and with mean gestational age of (19.6 ± 1.0) weeks. Cytogenetic cultures and karyotyping were made to every sample. Genomic DNA was extracted from the samples. The sequences of twenty short tandem repeat (STR) markers were designed according to the GenBank and references, including 6 STR markers in chromosome 21, 4 in chromosome 18, 4 in chromosome 13, 4 in chromosome X, 1 in chromosome Y and 1 universal marker in both X and Y chromosome. Each sample was amplified by two sets of multiple QF-PCR, which included 4 STR markers in each of 21, 18, 13 and sex chromosomes. If the result was uninformative, the third set of another 4 STR markers was added. RESULTS: (1) Karyotyping. Cytogenetic analysis were made for all the 170 samples, 151 (89%) of which were normal, and 19 (11%) were abnormal. (2) QF-PCR assay. 167 (98%) samples were detected by QF-PCR. The results were obtained within 2 - 3 days after sampling. 134 samples were proved normal by QF-PCR, which was consistent with karyotyping. Among the 19 abnormal karyotype samples, 18 were detected as abnormal(eight were 21-trisomy, three were 18-trisomy)by QF-PCR. Among the 167 samples, 150 (90%) were detected using the first and second set of STR mixtures, and 3 (2%) were detected when the third set of STR was added. The remain 14 (8%) were uninformative. (3) The diagnostic efficiency of QF-PCR. The sensitivity of QF-PCR in prenatal diagnosis of common aneuploidities was 95%, the specificity, the false positive rate, the false negative rate, the positive predictive value and negative predictive value were 100%, 0, 5%, 100% and 99%, respectively. (4) Autosome and sex chromosome detection by QF-PCR. Among all the STR markers, D21S1270 and D21S1411 had the highest heterozygosities in chromosome 21, and DXS8377 had the highest in sex chromosome. The amplifications were stable. CONCLUSION: Multiple QF-PCR assay is a valid alternative in rapid prenatal diagnosis of common chromosome aneuploidies. With high accuracy, it can be used for numerous sample test in large-scale laboratories.

A novel competitive fluorescent multiplex STR polymorphism assay for rapid, reliable and single-tube screening of 22q11.2 copy-number aberrations.

Copy-number aberrations of the 22q11.2 region can lead to varied resulting and complex phenotypes. Routine screening for these common constitutional chromosomal abnormalities requires powerful tools. A competitive fluorescent multiplex STR polymorphism assay (CFMSA) was built for detecting these aberrations. With the introduction of an internal reference and distinguishable STR polymorphism markers, this competitive fluorescent multiplex STR polymorphism assay provides complementary information about polymorphism and gene dosage in one tube simultaneously, thereby enhancing the assay sensitivity. It was first tested in 110 normal controls, and was proven to have highly polymorphic and reliable gene dosage information. Then, 476 subjects with congenital heart defect were screened according to the testing strategy of the American Heart Association, and 17 deletions and 1 duplication of 22q11.2 were correctly identified. It is expected that this assay will serve as a cost-effective alternative to existing assays for routine, large-scale screening in all at-risk individuals with either deletion or duplication in 22q11.2.

Pregnancy outcomes of repeat cesarean section in Peking Union Medical College Hospital.

OBJECTIVE: To evaluate the effect of elective repeat cesarean section on the maternal and neonatal outcomes. METHODS: A retrospective clinic- and hospital-based survey was designed for comparing the maternal and neonatal outcomes of elective repeat cesarean section [RCS group (one previous cesarean section) and MRCS group (two or more previous cesarean sections)] and primary cesarean section (FCS group) at Peking Union Medical College Hospital from January 1998 to December 2007. RESULTS: The incidence of repeat cesarean section increased from 1.26% to 7.32%. The mean gestational age at delivery in RCS group (38.1+/-1.8 weeks) and MRCS group (37.3+/-2.5 weeks) were significantly shorter than that in FCS group (38.9+/-2.1 weeks, all P<0.01). The incidence of complication was 33.8% and 33.3% in RCS group and MRCS group respectively, and was significantly higher than that in FCS group (7.9%, P<0.05). Dense adhesion (13.5% vs. 0.4%, OR=7.156, 95% CI: 1.7-30.7, P<0.01) and uterine rupture (1.0% vs. 0, P<0.05) were commoner in RCS group compared with FCS group. Neonatal morbidity was similar among three groups (P>0.05). CONCLUSIONS: Repeat cesarean section is associated with more complicated surgery technique and increased frequency of maternal morbidity. However, the incidence of neonatal morbidity is similar to primary cesarean section.

[Correlation of a disintegrin and metalloprotease 12 level in maternal serum during the first trimester with pregnancy outcome].

OBJECTIVE: To explore the relationship between pregnant outcomes and the maternal serum level of a disintegrin and metalloprotease 12 (ADAM 12) in the first trimester. METHODS: From July 2007 to January 2008, the serum levels of ADAM 12 of 511 women in their first trimester (6 - 13 gestational weeks), who attended the clinics at Peking Union Medical College Hospital, were tested by Time-Resolved Fluorescence Immunoassay (TR-FIA), and the results and pregnant outcomes were analyzed. RESULTS: (1) The median levels of ADAM 12 at 6, 7, 8, 9, 10, 11, 12, 13 weeks of gestation were 14.63 microg/L, 35.08 microg/L, 88.90 microg/L, 186.51 microg/L, 370.62 microg/L, 537.71 microg/L, 632.55 microg/L, and 769.42 microg/L, respectively, showing a linear increase with the gestational age (r =0. 992, P < 0.01). (2) Among the 511 pregnancies, 427 were normal singleton term pregnancies and 84 had adverse perinatal outcomes. Twenty-seven miscarriages (5.3%, 27/511) and 5 ectopic pregnancies were reported and the Multiple of Medians (MOM) of them were 0.24 and 0.32, respectively, which was significantly lower than the normal singleton pregnancies (1.01, P < 0.05). However, the serum level of ADAM 12 in 5 women with placenta previa (MOM = 1.45) was significantly higher than the normal ones (P < 0.05). No significant correlation was found between the fetal birth weight and maternal serum level of ADAM 12 in the first trimester (r = -0.15, P < 0.05). (3) Thirteen cases with chromosomal abnormalities was identified out of 97 cases who received fetal karyotyping, including 3 Down's syndrome and 2 Turner syndrome, and the MOM of ADAM 12 in these 13 cases (0.34) was significantly different from those normal singleton pregnancies (P < 0.05). MoMs of ADAM 12 in 10 euchromosome aneupolyhaploids cases (0.29)were lower than the normal ones (P < 0.05). CONCLUSION: The maternal serum level of ADAM 12 in the first-trimester is a potential marker for aneupolyhaploid screening and early fetal loss prediction, and is suggested to be tested at 9-12 gestational weeks as part of prenatal screening.

The pregnancy outcomes of patients with rudimentary uterine horn: A 30-year experience.

OBJECTIVES: To evaluate the presentation, assessment, treatment, and pregnancy outcomes of 22 women with a rudimentary uterine horn. METHODS: We reviewed the data regarding the outcomes of patients with a rudimentary horn pregnancy (RHP) who were managed at Peking Union Medical College Hospital over the last 30 years. Twenty-two pregnant patients with a rudimentary horn have been treated at our institute over the last 30 years. All patients with RHP were divided into two groups: Type A (n = 4), a rudimentary horn with a cavity that communicated with the uterus; and Type B (n = 7), a rudimentary horn with a cavity that did not communicate with the uterus. We classified all 22 patients into communicating group or noncommunicating group according to the anatomical connection of the rudimentary horn to the contralateral hemiuterus. RESULTS: The mean gestational age of Type A patients (23.5 weeks) was significantly higher (P = 0.046) than that of Type B patients (10 weeks). The rudimentary uterine horn carried 4 of 5 (80%) pregnancies in the communicating group. Three case of rudimentary horn pregnancies ruptured before a gestational age of 12 weeks, and one abortion occurred after a gestational age of 12 weeks. In the noncommunicating group, 7 of 17 (41.2%) cases were RHPs, and 3 ruptured after a gestational age of 12 weeks. CONCLUSIONS: The diagnosis and management of the rudimentary uterine horn continues to be challenging. Medical and radiological personnel must maintain a high degree of alertness to prevent the morbidity associated with this condition. In particular, patients with RHP (Type A), who have a higher chance being misdiagnosed before 12 gestational weeks, have a higher risk of potential complications. If pregnancy in the rudimentary horn is diagnosed, excision of the pregnant horn is recommended, regardless of the type of unicornuate uterus.

Maternal Serum Angiogenic Factor sFlt-1 to PlGF Ratio in Preeclampsia: A Useful Marker for Differential Diagnosis and Prognosis Evaluation in Chinese Women.

The ratio of soluble fms-like tyrosine kinase-1 to placental growth factor (sFlt-1/PlGF) is elevated and proved to be useful in preeclampsia (PE) diagnosis. Its value in differential diagnosis with other pregnancy complications and prediction of pregnancy duration has yet to be clarified in Chinese population. We retrospectively analyzed 118 singleton pregnancies with suspected or diagnosed PE at the Peking Union Medical College Hospital (PUMCH) in China. Among these, 62 pregnancies were diagnosed as PE (48 early onsets and 14 late onsets, with 39 and 5 severe PE, respectively), 12 gestational hypertension (GH), 15 chronic hypertension (chrHTN), 16 autoimmune diseases, and 13 pregnancies with uncomplicated proteinuria. And 76 normal pregnancies were included as control. The results showed (1) the sFlt-1/PlGF ratio in early onset PE subgroup was significantly higher than that in GH, chrHTN, and control groups; the sFlt-1/PlGF ratio in late onset PE subgroup was significantly higher than that in chrHTN and control groups, but similar as GH group; the sFlt-1/PlGF ratio was similar among GH, chrHTN, and control groups. (2) The sFlt-1/PlGF ratio was significantly increased in the PE group compared with autoimmune disease and uncomplicated proteinuria pregnancies. (3) By ROC curve analysis, the cutoff value of the sFlt-1/PlGF ratio was less than 21.5 to rule out PE and higher than 97.2 to confirm the diagnosis of PE. (4) The sFlt-1/PlGF ratio was higher in PE pregnancies delivering within 7 days than those more than 7 days, either in early onset PE or severe PE. In conclusion, we show that maternal sFlt-1/PlGF ratio is an efficient biomarker in the diagnosis and differential diagnosis of PE. This ratio can be used to predict the timing of delivery for PE pregnancies.

Short-Term Prediction of Adverse Outcomes Using the sFlt-1 (Soluble fms-Like Tyrosine Kinase 1)/PlGF (Placental Growth Factor) Ratio in Asian Women With Suspected Preeclampsia.

Current diagnostic criteria have limited clinical value for prediction of preeclampsia and fetal adverse outcomes. The prediction of short-term outcome in pregnant women with suspected preeclampsia study in Asia (PROGNOSIS Asia) was a prospective, multicenter study designed to investigate the value of the sFlt-1 (soluble fms-like tyrosine kinase 1)/PlGF (placental growth factor) ratio for predicting adverse outcomes in pregnant Asian women with suspected preeclampsia. Seven hundred sixty-four pregnant women at gestational week 20+0 days (18+0 days in Japan) to 36+6 days were enrolled at 25 sites in Asia. The primary objectives were to demonstrate the value of the sFlt-1/PlGF ratio for ruling out preeclampsia within 1 week and ruling in preeclampsia within 4 weeks. The value of the ratio for predicting fetal adverse outcomes was also assessed. Seven hundred patients were evaluable for primary end point analysis. The prevalence of preeclampsia was 14.4%. An sFlt-1/PlGF ratio of ≤38 had a negative predictive value of 98.6% (95% CI, 97.2%-99.4%) for ruling out preeclampsia within 1 week, with 76.5% sensitivity and 82.1% specificity. The positive predictive value of a ratio of >38 for ruling in preeclampsia within 4 weeks was 30.3% (95% CI, 23.0%-38.5%), with 62.0% sensitivity and 83.9% specificity. An sFlt-1/PlGF ratio of ≤38 had a negative predictive value of 98.9% (95% CI, 97.6%-99.6%) for ruling out fetal adverse outcomes within 1 week and a ratio of >38 had a positive predictive value of 53.5% (95% CI, 45.0%-61.8%) for ruling in fetal adverse outcomes within 4 weeks. The sFlt-1/PlGF ratio cutoff of 38 demonstrated clinical value for the short-term prediction of preeclampsia in Asian women with suspected preeclampsia, potentially helping to prevent unnecessary hospitalization and intervention.

Role of different childbirth strategies on pelvic organ prolapse and stress urinary incontinence: a prospective study.

BACKGROUND: Traumatic damage to fascial and muscular support structures during childbirth may be a major factor of the development of stress urinary incontinence (SUI) and pelvic organ prolapse (POP). The aim of this study was to prospectively investigate the role of different childbirth strategies on POP and SUI. METHODS: A total of 120 selected pregnant women were recruited and divided into two groups: vaginal delivery group (n = 72) and selective cesarean delivery group (n = 48). The women were questioned with SUI sheet and estimated with POP quantification (POP-Q) within 6 - 8 weeks after delivery. The correlations of SUI and results of POP-Q with the strategies of delivery were analyzed. t test, chi(2) test, and the Mann-Witney test were used for statistical analysis. RESULTS: Among the 120 women, SUI was developed during 29 - 30 gestational weeks in 20 patients (16.6%), of whom 14 (70%) had symptoms of SUI till 6 weeks postpartum. Totally 20 (16.6%) women had SUI symptoms after delivery. The prevalence of postpartum SUI was positively correlated with the occurrence of SUI during 29 - 30 gestational weeks (P < 0.001). In the vaginal delivery group, 100% of the women suffered form urinary prolapse 6 weeks postpartum, while 87.5% of those in the selective cesarean delivery group developed POP (P < 0.01). The percentages of the first- and second-degree urinary prolapse in the vaginal delivery group were 20.8% and 79.2% respectively, which were significantly different from those in the selective cesarean delivery group (64.6% and 22.9%; both P = 0.000). CONCLUSIONS: Pregnancy and delivery play an etiologic role in the development of SUI and POP. The onset of SUI during late pregnancy implies a significant risk of postpartum SUI symptoms. The prevalence of POP is significantly higher after vaginal delivery than after cesarean delivery.

[Clinical analysis of 47 cases of placenta accreta in the second and third trimesters].

OBJECTIVE: To explore the clinical characters, diagnosis and treatment methods of placenta accreta. METHODS: A retrospective analysis was made of 47 cases of placenta accreta admitted during May 1997 to May 2007 into Peking Union Medical College Hospital. They included 17 cases in the second trimester and 30 cases in the third. RESULTS: Among all the patients, the incidence of placenta accreta was 0.262% (47/17 918). Most of these cases (81%, 38/47) experienced a uterine procedure. 30% (14/47) of the cases were found with placenta previa and 11% (5/47) with myoma in the current pregnancy. 11% (5/47) of all the cases suffered postpartum hemorrhage. In the 17 cases in the second trimester, 12 were diagnosed by ultrasonography and 5 by clinical evidence. While in the 30 cases in the third trimester, 8 were diagnosed by biopsy, 2 by ultrasonography, and 20 by clinical evidence. 45 cases were cured by conservative treatment, which included dilatation and curettage, uterine artery embolization (UAE) with or without methotrexate (MTX), tamping B-lynch suture, singly with MTX, and mifepristone. Only 2 cases received cesarean hysterectomy. CONCLUSIONS: The incidence of placenta accreta seems on the rise. The incidence in the second trimester is higher than that in the third. In the second trimester, most cases can be diagnosed by ultrasonography after labor, and presently UAE is the best conservative management. While in the third trimester clinical evidence is the most frequent diagnostic approach. A majority of the cases could be cured by conservative therapies, which help them avoid a hysterectomy.

[Effect of induction delivery on maternal-neonatal outcomes in 41 gestational weeks primiparae].

OBJECTIVE: To estimate the maternal-neonatal morbidity associated with induction deliveries compared with spontaneous deliveries in 41 gestational weeks uncomplicated primiparae. METHODS: Three hundred and seventy-four uncomplicated primiparous deliveries at 41 gestational weeks at Peking Union Medical College Hospital from Sept 2002 to Apr 2007 were reviewed, including 225 women undergoing induced labor and 149 women undergoing spontaneous labor. The induction methods included drug induction (173), rupture of membrane induction (5) and combined drug with rupture of membrane induction (47). The maternal morbidity, delivery method, maternal cost on hospital stay and neonatal asphyxia associated with induction deliveries or spontaneous deliveries were retrospectively analyzed. RESULTS: (1) There was no maternal death. The caesarean section rate in the induction group (44.0%, 99/225) was significantly higher than that of spontaneous group (18.1%, 27/149; P<0.05). (2) No statistically significant difference (P>0.05) was observed between induction group and spontaneous group in the following puerperal complications: postpartum hemorrhage (2.7%, 6/225 and 1.3%, 2/149 respectively), puerperal morbidity (0.9%, 2/225 and 0.7%, 1/149 respectively), severe amniotic fluid contamination (11.6%, 26/225 and 13.4%, 20/149 respectively), wound infection (0.9%, 2/225 and 0.7%, 1/149 respectively) ,urinary retention(4.4%, 10/225 and 3.4%, 5/149 respectively), traumata (0.4%, 1/225 and 0 respectively) and neonatal asphyxia (1.3%, 3/225 and 2.0%, 3/149 respectively). (3) The average duration of first stage of labor in the induction group (413 min) was not significantly different from that of spontaneous group (461 min; P>0.05). In the induction group, more women had precipitate labors (P<0.05) and the average duration of the second stage of labor was shorter than that of spontaneous group (40 min and 48 min, P<0.05). (4) Spontaneous group had shorter maternal hospital stay [(5.7 +/- 1.9) days vs (6.9 +/- 2.7) days, P<0.05] and caesarean section after induction had the highest hospital expense (P<0.05). CONCLUSIONS: Induction delivery at 41 weeks of gestation increases the rates of caesarean section, precipitate labor, clinical workload and hospital costs. Induction delivery as a prevention method of over due labor needs to be further discussed. Uncomplicated pregnancies of 41 weeks should be intentionally monitored if continued surveillance is possible. They should wait for spontanous delivery, and decision of induction should be made based on its benefit to the case.

[Effect of pregnancy and spontaneous delivery on the morphology of levator ani muscle and expression of vaginal nerve fibers].

OBJECTIVE: To investigate the effect of pregnancy and spontaneous delivery on the morphologic characteristics of the levator ani muscle and innervation of the vaginal mucosa. METHODS: Eight nullipara without pelvic floor dysfunction (PFD) and 64 normal primipara undergoing spontaneous delivery were enrolled in this study during July to December 2006 in Peking Union Medical College Hospital. Biopsy specimens of levator ani muscle (LAM) and anterior and posterior vaginal walls were obtained from the puerpera as well as from the 8 nullipara undergoing vaginal operation. The structures of LAM were examined with histological techniques. Vaginal mucosa specimens were examined using immunohistochemistry staining for protein gene product 9.5 (PGP 9.5), vasoactive intestinal peptide (VIP) and ne uropeptide Y (NPY), and the positive stained nerve fibers were calculated respectively. RESULTS: The LAMs of the puerpera undergoing spontaneous delivery presented myogenetic and neurogenetic changes, both acute and chronic. Type I muscular fibers were predominant (79%) with both types increasing in diameters [(86 +/- 9) microm and (79 +/- 15) microm]. Significantly different (P < 0.05) innervation of PGP 9.5, VIP, and NPY nerve fibers was observed between epithelial lamina of anterior vaginal wall (5.9 +/- 3.3, 7.6 +/- 3.1 and 8.2 +/- 3.2, respectively) and that of posterior vaginal wall (3.8 +/- 2.9, 5.9 +/- 3.1 and 6.0 +/- 3.0, respectively), with the nerve fibers being more in epithelial lamina of anterior vaginal wall, while no difference in the innervation of nerve fibers was observed in the lamina propria. Significantly different (P < 0.05) innervation of PGP 9.5 and VIP nerve fibers was observed in the lamina propria of the anterior vaginal wall in puerperal undergoing vaginal delivery (6.9 +/- 3.2 and 4.9 +/- 2.1) compared with those in nullipara (3.9 +/- 3.6 and 3.1 +/- 1.2). CONCLUSIONS: Pathologic changes occur in LAMs and pelvic floor nerves during labor and delivery. LAM fibers become hypertrophy to adapt to the physiological changes during pregnancy. Richer innervation of PGP 9.5 and VIP nerve fibers in the lamina propria of the anterior vaginal wall in puerpera undergoing spontaneous delivery is beneficial for dilation of the blood vessels and smooth muscles and makes preparation for delivery.

[Second trimester maternal serum screening for Down's syndrome in women of advanced maternal age: a multi-center prospective study].

OBJECTIVE: To evaluate the performance characteristics of the second trimester double test for the detection of fetal Down's syndrome (DS) in women of advanced maternal age (AMA). METHODS: We undertook a prospective nation-wide multi-centered study and chose alpha-fetoprotein (AFP) and free beta-subunit of human chorionic gonadotrophin (free beta-hCG) as the serum markers. Between May 2004 and September 2006, 12 centers participated in the collection and analysis of maternal serum AFP and free beta-hCG. Patients with an increased risk of DS (> or = 1/270) were offered genetic amniocentesis. Follow up of the outcome of all pregnancies was obtained. Patients were divided into two groups, the AMA group and the non-AMA group and the screening efficiency was evaluated in both groups. RESULTS: A total of 66 132 singleton pregnancies were included in the study, and there were 3610 (5.46%) AMA women. The median maternal age of AMA women was 36.8years (35 - 47 years). At a cut-off of 1/270, in the AMA group, the number of positive cases screened was 727 and 22 cases of fetal DS were detected; the number of negative cases screened was 2883, and no fetal DS was found. In the non-AMA group, the number of positive cases screened was 4743 and 69 cases of fetal DS were detected; the number of negative cases screened was 57 779, and 6 cases of fetal DS were diagnosed postnatally. In AMA group, the detection rate (DR), false positive rate (FPR) and odds of being affected given a positive result (OAPR) were 100%, 19.7% and 3.0% respectively. In the non-AMA group, the DR, FPR and OAPR were 92.0%, 7.5% and 1.5% respectively. CONCLUSION: The double-marker test using AFP and free beta-hCG is an effective screen strategy for second-trimester detection of Down syndrome in AMA women.