Genetic amniocentesis: gestation-specific pregnancy outcome and comparison of outcome following early and traditional amniocentesis.

Amniocentesis remains the most common prenatal diagnostic invasive procedure for fetal karyotyping. During counselling prior to this procedure miscarriage rates are often quoted as a single figure. In this review of 2924 amniocenteses, we report that miscarriage rates vary with the gestational age at which the procedure is performed. The total miscarriage rate was 1.0 per cent after early amniocenteses (11 + 0-14 + 6 weeks) and 1.2 per cent after traditional mid-trimester amniocenteses (15 + 0-18 + 6 weeks). The rate was greatest (3.1 per cent) for amniocenteses performed after 18 + 6 weeks' gestation. The cumulative miscarriage risk increased from 0.03 per cent one week after the procedure to plateau at 1.1 per cent five weeks after the procedure. The preterm and still-birth rates following amniocenteses were similar in early and traditional mid-trimester amniocenteses but were significantly higher when amniocenteses were performed after 19 weeks' gestation. Although the incidence of talipes equinovarus was higher after early amniocentesis compared with traditional mid-trimester amniocenteses (1.4 per cent versus 0.2 per cent), none of the affected infants required corrective surgery. We conclude that counselling for this procedure should be tailored to each unit's unintended fetal loss rate based on cumulative rates. Such figures should be available to parents to assist them in their decision-making.     

Decreased first trimester PAPP-A is a predictor of adverse pregnancy outcome

OBJECTIVE: Low levels of maternal serum pregnancy associated plasma protein-A (PAPP-A) have been linked to chromosome anomalies such as trisomy 21, 13 and 18, triploidy and sex chromosome aneuploidy. Low levels of PAPP-A have also been implicated in spontaneous miscarriage. The purpose of this study was to evaluate whether low levels of first trimester PAPP-A are predictive of other adverse pregnancy outcomes. STUDY DESIGN: The study included patients with singleton pregnancies who underwent combined first trimester screening using nuchal translucency (NT) and maternal serum free beta-human chorionic gonadotrophin (free beta-hCG) and PAPP-A at 10-13 weeks' gestation. Patients with chromosome aberrations or fetal anomalies were excluded. Serum marker levels were expressed as gestational age-specific multiples of the median (MoMs). The incidences of various adverse pregnancy outcomes (spontaneous preterm labor, fetal growth restriction (FGR), proteinuric and non-proteinuric pregnancy induced hypertension (PIH), intrauterine fetal demise, oligohydramnios, spontaneous miscarriage and placental abruption) were evaluated, according to maternal PAPP-A MoM levels. RESULTS: Of the 1622 patients in the study, pregnancy complications were observed in 184 (11.3%). Patients with PAPP-A < or =0.25 MoM had significantly higher rates of FGR (RR = 3.12), proteinuric PIH (RR = 6.09), spontaneous miscarriage (RR = 8.76). No statistically significant differences were noted for other adverse outcomes evaluated Women with PAPP-A < or =0.50 MoM also had significantly higher rates of FGR (RR = 3.30) and spontaneous miscarriage (RR = 3.78). CONCLUSIONS: We conclude that decreased levels of first trimester maternal serum PAPP-A are predictive not only of chromosome anomalies but also of adverse pregnancy outcome.     

First trimester maternal serum free human chorionic gonadotropin as a predictor of adverse pregnancy outcome

OBJECTIVE: The purpose of this study was to evaluate whether abnormal levels of first trimester maternal serum free human chorionic gonadotropin (beta-hCG) are predictive of adverse pregnancy outcomes. METHODS: The study included 1,622 consecutive patients with singleton pregnancies who underwent first trimester Down syndrome screening using nuchal translucency, and maternal serum free beta-hCG and pregnancy-associated plasma protein-A. Patients with fetal anomalies or chromosome aberrations were excluded from the study. The incidences of various adverse pregnancy outcomes were evaluated according to maternal serum free beta-hCG levels. Outcome variables included spontaneous miscarriage, proteinuric and non-proteinuric pregnancy-induced hypertension, fetal growth restriction, intrauterine fetal demise, spontaneous preterm delivery, oligohydramnios and placental abruption. RESULTS: No significant differences were noted between groups for any of the demographic variables. The only statistically significant result was an increase in the relative risk for spontaneous miscarriage (RR = 6.33) at free beta-hCG <0.2 multiples of the medians. No other statistically significant result was noted for the other adverse outcomes or for the overall complication rate. CONCLUSION: Low free beta-hCG is associated with a higher incidence of spontaneous miscarriage but is a poor predictor of other pregnancy complications.     

Are CD57+ Natural Killer cells really important in early pregnancy failure?

Objective  The aim of this study was to compare the CD57+ Natural Killer (NK) cell counts in normal pregnancies and in cases grouped according to different types of early pregnancy failure. Materials and methods  A prospective case control study which was set in Baskent University Faculty of Medicine, Obstetrics and Gynecology Department. A total of 119 women whose pregnancies ended in the first trimester were divided into elective pregnancy termination, incomplete miscarriage, intrauterine demise, ectopic pregnancy and recurrent pregnancy loss groups. CD57+ NK cells were stained and counted in the histologic preparations of the decidua in all of these groups. Results  CD57+ NK cell counts were 2.14 ± 1.42 in control, 2.24 ± 1.92 in incomplete miscarriage, 1.82 ± 1.34 in intrauterine demise, 2.54 ± 1.80 in ectopic pregnancy and 3.42 ± 2.15 in recurrent pregnancy failure group. There were no statistically significant differences between the control group and the other four groups with respect to the CD57+ NK cell counts. Conclusion  This study suggests that CD57+ NK cell count is not associated with early pregnancy failure. This study was supported by Baskent University Grant KA06/238 after Institutional Review Board Approval.     

Anti-cardiolipin antibody and anti-cardiolipin beta-2-glycoprotein I antibody in patients with recurrent fetal miscarriage

To elucidate the association between anticardiolipin antibody (aCL-Ab) or anti-cardiolipin beta-2-glycoprotein I-antibody (aCL-beta-2-GP I-Ab) and recurrent fetal miscarriage, the positive rates of aCL-Ab were assessed in 667 patients with recurrent fetal miscarriages and those of aCL-beta-2-GP I-Ab were assessed in 208 patients. The rates were then compared with the control group. The positive rate of aCL-Ab in the patients group (17.4%) was significantly higher than that in the control group (4.0%). The rate of aCL-Ab was especially high in patients who had experienced two or more fetal miscarriages including at least one or more intrauterine fetal deaths during the second or third trimester (41.3%). The positive rate of aCL-beta-2-GP I-Ab in patients with recurrent fetal miscarriage (3/208 cases, 1.4%) was not significantly different from the control group (0/100 cases, 0%). However, the rate of aCL-beta-2-GP I-Ab was significantly higher in patients who had experienced two or more fetal miscarriages including at least one or more intrauterine fetal deaths during the second or third trimester (8.3%) compared with the control group. In conclusion, the implication of aCL-Ab in the genesis of recurrent fetal miscarriage was confirmed. It was suggested that aCL-beta-2-GP I-Ab was associated with the generation of intrauterine fetal death, although it had little association with the genesis of recurrent fetal miscarriage during the first trimester.     

Cervical fetal fibronectin as a predictor of first trimester pregnancy outcome in unexplained recurrent miscarriage

OBJECTIVE: To determine whether cervical fetal fibronectin is a reliable predictor of first trimester pregnancy outcome in patients with unexplained recurrent miscarriage. STUDY DESIGN: A prospective observational study was carried out on 49 pregnant women with a history of unexplained recurrent miscarriage. In all participants the presence of fetal fibronectin in the cervical secretion was determined with a qualitative rapid immunoassay. The outcome of the first trimester pregnancy was recorded a successful outcome was a pregnancy that progressed beyond 12 weeks of gestation; a miscarriage referred to a pregnancy loss in the first 12 weeks. RESULTS: Of the 49 subjects screened, fetal fibronectin was positive in 17 and negative in 32. Overall, 14 pregnancies resulted in fetal loss before the 12th week of gestation. Fetal cervical fibronectin was positive in 6 of the 14 patients who miscarried and in 11 of the 35 in whom outcome was successful. As predictor of first trimester pregnancy outcome the test had a sensitivity and a specificity of 43% and 69% and positive and negative predictive values of 35%, and 75%, respectively. Subgroup analysis by number of previous miscarriages and maternal age gave similar values. CONCLUSION: This study examines the possible value of cervical fetal fibronectin in predicting first trimester pregnancy outcome. We conclude that the occurrence of positive or negative fetal cervical fibronectin test has only limited predictive value and therefore its use cannot be considered for clinical application.     

Medical management of early fetal demise using sublingual misoprostol

The aim of this study was to determine the efficacy of mifepristone in combination with sublingual misoprostol for the medical management of early fetal demise. Fifty-six consecutive women were studied prospectively. The mean (SD) gestation at diagnosis was 9.6 weeks (1.84). Four women had complete miscarriage with mifepristone alone. The overall success rate was 83.9% and the median induction–miscarriage interval was 8.19 hours (range 0.83 to 37.50 hours). Of those women who had a successful outcome, 91.5% were satisfied with the regimen. Sublingual misoprostol in combination with mifepristone is an effective and safe alternative to vaginal or oral misoprostol in the management of early fetal demise.     

Complications rate and pregnancy outcome in women who underwent early and mid trimester amniocentesis

OBJECTIVES: Evaluation of the complications rate, as well as pregnancy outcome, in women who underwent early and mid-trimester amniocentesis. MATERIAL AND METHODS: The study was conducted among 454 patients, including 162 women after the procedure performed before 15 gestational week and 292 patients who underwent classic amniocentesis. All patients were hospitalized in Division of Reproduction of University of Medical Sciences in Poznan between 1999 and 2005. The analysis, based both on clinical observations and questionnaire sent to patients, concerned especially the frequency of following complications: miscarriage, premature rupture of membranes and club foot in newborns. RESULTS: Total pregnancy loss rate due to amniocentesis amounted to 1.2% and 0.3% in early and mid-trimester amniocentesis, respectively, not reaching statistical significance. The frequency of club foot in newborns of mothers who underwent amniocentesis did not differ significantly between the groups, although it was four times higher in early amniocentesis group than in patients in whom mid-trimester amniocentesis had been performed. CONCLUSIONS: The safety of early amniocentesis is comparable with safety of mid-trimester amniocentesis.     

Intrauterine fetal demise following laser treatment in twin-to-twin transfusion syndrome

OBJECTIVE: To evaluate the incidence, risk factors and consequences of intrauterine fetal demise (IUFD) of at least one twin in twin-to-twin transfusion syndrome (TTTS) treated by laser. DESIGN: Retrospective analysis. SETTING: Experience of a single centre between 1999 and 2004. POPULATION: A subgroup of 45 cases with fetal demise of one or both twins from a series of 120 cases of TTTS treated by laser. METHODS: All cases were entered prospectively into a dedicated database and the results were analysed retrospectively. MAIN OUTCOME MEASURES: Fetal demise prognostic factors, survival, fetal anaemia, brain lesions, neonatal death and intact survival. RESULTS: IUFD of one twin occurred in 40 of 120 cases (19 donors and 21 recipients). IUFD of both twins occurred in another five cases. From these 40 cases, miscarriage occurred in two and pregnancy termination was requested in another two cases because of antenatal brain lesions. Two neonates died and two presented severe morbidity, survivors were therefore neurologically normal at 6-44 months of life in 89% (32/36) of the cases. Univariate analysis showed that preoperative abnormal umbilical artery Doppler in the donor before laser treatment and in the recipient following laser treatment was associated with their demise. Incomplete coagulation was suspected in cases where anaemia or cerebral lesions developed following the death of the first twin (10). CONCLUSIONS: IUFD of one or both twins occurred in 45 of 120 (38%) cases of severe TTTS treated by laser. In these, separation of the placental circulations was incomplete in at least 22% (10/45) of the cases. Umbilical artery Doppler abnormalities before laser were found to be risk factors for the donors' demise following the procedure.     

Manual vacuum aspiration under local anaesthetic for early miscarriage: 2 years experience in a university teaching hospital in UK

Manual vacuum aspiration under local anaesthesia (MVA-LA) in an outpatient setting is an alternative to the standard surgical aspiration under general anaesthesia for miscarriage. We evaluate the feasibility, safety and clinical outcomes of MVA-LA in the management of miscarriage at less than 12 weeks of gestation in an outpatient setting. This prospective cohort study was conducted at the Birmingham Women’s Hospital. One hundred and thirty-one women with ultrasound scan confirmed incomplete or missed miscarriage underwent MVA-LA between November 2010 and January 2013. A computer database was used to record relevant information. The mean gestation age was 8.3 weeks (±1.8). Successful evacuation was achieved in 100 % of cases. One hundred and fourteen (87 %) patients underwent the procedure with direct intracervical LA block and the remaining cases did not have LA. There were no reported complications in 96 % of procedures. Cervical injury and vasovagal symptoms noted in 3.8 % of cases. In all cases, vaginal bleeding was minimal or mild. The post-operative pain was controlled successfully with a combination of paracetamol and diclofenac in 82 % of patients. The MVA method was associated with high levels (93 %) of patient satisfaction and acceptability. MVA-LA in an outpatient setting is a safe and acceptable therapeutic option for women diagnosed with early missed or incomplete miscarriage.     

Significance of Antinuclear Antibody Testing in Unexplained Second and Third Trimester Fetal Deaths

The purpose of this study was to determine if a group of patients with unexplained second or third trimester fetal demise have an increased prevalence of antinuclear antibodies (ANA) when compared to controls. During a 5-year period from January 1989 through December 1993, the records of all fetal deaths ≥ 500 g or ≥ 20 weeks of gestation that occurred at our institution were reviewed. In these women the ANA titers were checked at the discretion of the physician. The proportion of positive ANA tests in the group of women with explained fetal deaths was compared to that in women with unexplained fetal deaths. These results were then compared to a control group of healthy gravidas presenting to labor and delivery in the third trimester. During this time period, 848 fetal deaths were recorded. Our study population consisted of 286 patients who had an unexplained second or third trimester fetal demise with a record of having an ANA drawn. Of the 376 explained fetal deaths, 190 had an ANA assayed. The control group included 299 healthy third trimester gravidas. In the group of patients with unexplained fetal death, 11.5% (33/286) had a positive ANA, whereas 16% (31/190) of ANA tests were positive in cases of explained fetal death (P = 0.17). In the control group, 14% (43/299) had a positive ANA. There were three distinct immunofluorescence patterns: nucleolar, speckled, and homogeneous. The first two were seen more often in the control group, whereas the latter was seen more frequently in those patients with fetal death (P = 0.10). The incidence of a significant circulating ANA titer was similar in patients and controls. Moreover, there was no significant association between circulating antinuclear antibody titers and fetal outcome. More patients with a fetal death had a homogeneous nuclear fluorescence pattern when compared to controls; however, this finding was not statistically significant. Therefore, we do not recommend routine testing for ANA in women with unexplained second or third trimester fetal death.     

Analysis of intrauterine fetal demise—A hospital-based study in Taiwan over a decade

ObjectiveTo identify timing-specified risk factors for stillbirth, in order to help physicians to reduce preventable factors and stillbirths, and improve general outcomes of pregnancy.Materials and MethodsA retrospective analysis was performed of births registered in our hospital, a medical center in Taiwan, between September 1, 1999 and December 31, 2011. We collected basic characteristics from the medical records, including maternal and fetal conditions. All stillbirths were divided into two groups according to gestational age: the second trimester group and the third trimester group. Comparisons were made between these groups.ResultsThere were a total of 12,290 births and 121 stillbirths during our study period. The 121 stillbirths were divided into two groups: 67/121 (55.4%) were in the second trimester group and 54/121 (44.6%) were in the third trimester group. The overall incidence for intrauterine fetal demise was 0.98% (121/12,290). The increased risks in the third trimester stillbirths, as compared with the second trimester group, were significantly associated with males born, increased maternal body mass index (BMI) at delivery, habitual cigarette smoking, previous history of intrauterine fetal demise, and diabetic or hypertensive pregnancies. Unexplained causes (29.85%) were the most common causes of second trimester intrauterine fetal demise and the most common cause of third trimester intrauterine fetal demise was umbilical cord pathology (33.33%).ConclusionManagement of any pregnant patient remains a challenge. Identifying upstream and cost-effective solutions will improve these pregnancy outcomes.     

Macroscopic and microscopic morphology of first trimester miscarriage and subsequent pregnancy outcome - An exploratory study

IntroductionReduced chorionic villous vascularization is associated with first trimester miscarriage and second trimester fetal loss. Differences in villous vascularization have been observed in combination with complications in the third trimester of pregnancy. The aim of this study was to investigate whether abnormal morphology and reduced chorionic villous vascularization in first trimester miscarriages are associated with an increased risk on adverse outcome and/or pregnancy complications in subsequent pregnancy. Secondly, to assess the influence of these parameters on the length of the interpregnancy interval and infertility.MethodsIn a retrospective cohort study 134 consecutive women who underwent dilatation and curettage for a miscarriage were included. The degree of chorionic villous vascularization in miscarriage tissue was determined by a pathologist. Ultrasound details of these miscarriages and clinical data on the subsequent pregnancy of these women were obtained.ResultsNeither reduced vascularization nor early embryonic arrest in first trimester miscarriages are associated with an increased risk of a subsequent miscarriage or adverse obstetric and perinatal outcome of subsequent pregnancy. Abnormal morphology of the first trimester miscarriage did not influence the time to subsequent pregnancy. A shorter mean interpregnancy interval between miscarriages was observed after miscarriages with reduced chorionic villous vascularization (5.5 vs. 10.7 months; p = 0.051), showing a trend towards an association.DiscussionChorionic villous vascularization and morphology have no influence on subsequent pregnancy outcome. Therefore it remains unknown what aspects of miscarriage are causing the increased risk on subsequent miscarriage and complications in the third trimester of the subsequent pregnancy.     

Early signs of cardiac failure: a clue for parvovirus infection screening in the first trimester?

Parvovirus B19 is a small single-stranded DNA virus and a potent inhibitor of erythropoiesis due to its cytotoxicity to erythroid progenitor cells. Although adult disease is generally mild, fetal parvovirus B19 infection can cause spontaneous abortion in early pregnancy and aplastic anemia, nonimmune hydrops fetalis and in utero fetal demise. The prevalence of parvovirus B19 maternal infection during pregnancy is about 1-2%. The vertical transmission occurs in 10-35%, being highest in the first and second trimesters. The risk of adverse fetal outcome is 10%. In contrast to the second or third trimester, in pregnancies affected by increased nuchal translucency (NT) in the late first trimester, the prevalence of maternal infection was not higher than in the general population. We report a case of first-trimester parvovirus B19 infection with increased NT and reversed a-wave in the ductus venosus (DV) at 11 weeks, with fetal demise 2 weeks later.     

Pregnancy termination using vaginal misoprostol in women with more than one caesarean section.

We set out to evaluate the safety and efficacy of the proposed misoprostol regimen in women with previous multiple caesarean sections. This was a retrospective cohort study of 21 women with more than one caesarean section who underwent termination of pregnancy (TOP) with 400 mug of vaginal misoprostol followed by 200 mug/6 h (max 800 mug). The complete abortion rate was 12/21 (57.14%) and six (28.57%) women had an incomplete abortion. Three TOPs (14.29%) failed. In the first trimester group, only 3/9 (33.34%) aborted completely, while (9/12) 75% second trimester patients aborted completely. There were no major complications. The proposed regimen is considered safe and reasonably effective in second trimester TOPs in women with previous multiple caesarean sections. In first trimester patients, the possibility of manual vacuum aspiration (MVA) should be discussed during counselling, or a higher dose should be used as the effectiveness is low.     

Factor XII deficiency in women with recurrent miscarriage

Congenital thrombophilia is known to cause significant maternal complications, and possibly has an adverse effect on normal fetal development. The aim of this study was to assess the prevalence of factor XII (FXII) deficiency in women with a history of recurrent miscarriage. Two hundred and forty-one consecutive Japanese women with a history of two or more recurrent miscarriages were prospectively assessed for their etiology by conventional screening methods. Seven women were found to have reduced FXII activity (19. 2-46.1%) and prolonged activated partial thromboplastin time (33. 3-51.3 s). Of these 7 women, 6 had experienced early pregnancy losses, while 1 woman had experienced repeated mid-trimester fetal losses with coincidental gestational thrombocytopenia. In 241 women with a history of recurrent miscarriage, the prevalence of FXII deficiency was 2.9%.     

First trimester ultrasonographic diagnosis of fetal structural abnormalities in a low risk population

Objectives Ultrasonographic screening between 12⁺⁰¹ and 13⁺⁶ weeks for fetal structural abnormalities using transab dominal sonography and, where necessary, transvaginal sonography in a low risk population.
Design A prospective observational study
Setting London teaching hospital
Methods Pregnant women with a total of 1632 low risk viable fetuses between 12⁺⁰ and 13⁺⁶ weeks of gestation were scanned using transabdominal and, where necessary, transvaginal sonography (40%). If the anatomical survey was normal, the women underwent routine 18-20 week anomaly scans. Pregnancy outcomes were obtained from radiological and neonatal computerised databases, and postal or telephone patient enquiry.
Results Seventeen (1.0%) major structural abnormalities were diagnosed in the study group. Of these, 11 (64.7%) were diagnosed at the 12-13 week scan, three diagnosed in the mid-trimester and three postnatally. Of the fetal abnormalities diagnosed antenatally, 78.6% were diagnosed in the first trimester. The sensitivity of abnormality detection by the combination of both first and second trimester scans was 82.3%. In addition, a significant number of missed abortions (   n = 36  ) were also diagnosed by the first trimester scan.
Conclusion This study has demonstrated the potential of screening a low risk population for fetal abnormalities at 12-13 weeks of gestation using transabdominal sonography and, where necessary, transvaginal sonography. Larger studies are required to establish the clinical value of the first trimester scan.     

Routine histopathologic analysis of product of conception following first-trimester spontaneous miscarriages

AIM: To evaluate the histopathologic findings relating to tissue samples collected at surgical uterine evacuation in first-trimester spontaneous miscarriages. METHODS: In this retrospective study, histopathologic diagnosis of the tissue samples obtained via surgical uterine evacuation in patients who were admitted to the Early Pregnancy Clinic in a 12-month period with the diagnosis of incomplete miscarriage (n = 970), missed miscarriage (n = 406) and anembryonic miscarriage (n = 230) in the first trimester was recorded and compared with the presurgery diagnosis. RESULTS: Uterine evacuation was performed in cases of incomplete miscarriage (n = 970, 60.4%), missed miscarriage (n = 406, 25.2%) and anembryonic miscarriage (n = 230, 14.3%). Histopathologic examination revealed the product of conception in 1119 patients (69.7%), while partial hydatidiform mole was diagnosed in 33 patients (2.1%). Complete hydatidiform mole was detected in only seven cases (0.43%). Exaggerated placental site and placental site trophoblastic nodule was detected in two cases (0.12%). Decidual tissue without chorionic villi was reported in 272 patients (16.9%), raising the suspicion of presence of other pathology. CONCLUSIONS: By routine histopathologic assessment of products of first-trimester spontaneous miscarriages, important pathologies such as molar pregnancy and placental trophoblastic disease can be diagnosed. Histopathological assessment has great value in the identification of an ectopic pregnancy or infection when compared with clinical and laboratory findings.     

First trimester bleeding and maternal cardiovascular morbidity

Objectives

First trimester bleeding without miscarriage is a risk factor for complications later in the pregnancy, such as preterm delivery. Also, first trimester miscarriage has been linked to subsequent maternal ischemic heart disease. We investigated the link between maternal cardiovascular disease prior to and subsequent to first trimester bleeding without miscarriage.

Study design

We performed a registry-based retrospective cohort study of 796,915 women who gave birth to a singleton infant after 20 completed weeks in Denmark in 1978–2007. The exposures and endpoints were registry diagnoses of cardiovascular diseases preceding pregnancy, first trimester vaginal bleeding without miscarriage, and subsequent maternal cardiovascular disease. In the adjusted models, we considered preterm delivery, prelabor rupture of membranes, hypertensive pregnancy disorders, fetal growth restriction, placental abruption and stillbirth as possible confounders. We used logistic regression and Cox proportional hazard models to assess the associations.

Results

Women with pre-pregnancy cardiovascular disease had a 2.2-fold (95% CI 1.3–4.1) increased risk of first trimester bleeding without miscarriage, and first trimester bleeding without miscarriage was associated with a 1.6-fold (1.4–1.8) increase in risk of subsequent maternal ischemic hearth disease after adjusting for other adverse pregnancy outcomes.

Conclusion

First trimester bleeding without miscarriage is associated with pre-pregnancy as well as subsequent maternal cardiovascular morbidity.     

Elevated oestradiol concentrations are not associated with increased first trimester miscarriage rates of singleton gestations conceived by assisted conception treatment

The study evaluated the impact of elevated oestradiol concentrations on pregnancy loss during the first trimester in singleton gestations conceived via ovarian stimulation and intracytoplasmic sperm injection (ICSI). Following determination of oestradiol concentrations during 6478 ICSI cycles, patients were assorted by oestradiol percentile. Hyper-responders were defined as patients having peak oestradiol concentrations over the 90th percentile (>4200 pg/ml, 685 cycles), moderate responders were defined as patients having peak oestradiol concentrations between the 75th and 90th percentiles (3250-4200 pg/ml, 958 cycles) and normal responders were defined as patients having peak oestradiol concentrations between the 25th and 75th percentiles (1350-3250 pg/ml, 3325 cycles). The relationship between first trimester miscarriage rates and oestradiol percentiles was analysed in 1184 singleton gestations. Pregnancy rate was significantly lower in normal responders (54.4%) than in moderate (58.8%, P = 0.02) and hyper-responders (60.9%, P = 0.003), but there were no intergroup differences in miscarriage rate (19.6%, 17.1%, and 16.8%, respectively). Although women with severe ovarian hyperstimulation syndrome had a miscarriage rate of 40%, this rate did not differ significantly from the miscarriage rates of the other groups. The findings suggest that high oestradiol concentrations during ovarian stimulation do not expose singleton pregnancies to an increased risk of miscarriage during the first trimester.