The Impact of Fetal Anomalies on Contemporary Labor Patterns

The impact of major congenital anomalies on obstetric outcomes in the United Arab Emirates: the Mutaba'ah Study

Major congenital anomalies (MCAs) are a public health concern. However, studies on obstetric outcomes in pregnancies complicated by MCAs are scarce, emphasizing the need for research to enhance management strategies. This study aimed to investigate the impact of MCAs on fetal presentation and delivery mode in the United Arab Emirates. The analysis was based on a cohort of single live births in the Mutaba'ah study (2017-2023). Univariable and multivariable regression models assessed the associations between MCAs and obstetric outcomes, adjusting for maternal and neonatal characteristics. For any and single MCAs, significant associations with breech presentation were detected in women below 35 years (AOR = 2.7, 95% CI: 1.5-5.0; AOR = 2.5, 95% CI: 1.3-4.8) and among term deliveries (AOR = 2.5, 95% CI: 1.4-4.3; AOR = 2.4, 95% CI: 1.3-4.3). These associations remained significant in young (< 35 years) multiparous and older (≥ 35 years) nulliparous, as well as among term multiparous and preterm nulliparous women. The association with cesarean delivery was significant among multiparous below 35 years, where mothers of neonates with any MCAs had twice the odds of cesarean delivery (AOR = 2.1, 95% CI: 1.3-3.4). This study revealed a significant association between MCAs and the risk of breech presentation and cesarean delivery, varying by maternal age, gestational age, and parity. These findings underscore the need for early detection of MCAs in pregnancy, as this may help avoid obstetric complications. However, addressing the risk factors for MCAs and promoting a multidisciplinary approach would lead to even better outcomes for both mother and newborn.

Maternal implications of fetal anomalies: a population-based cross-sectional study

BACKGROUND

Although it is well-known that the presence of fetal anomalies is associated with maternal morbidity, granular information on these risks by type of anomaly is not available.

OBJECTIVE

To examine adverse maternal outcomes according to the type of fetal anomaly.

STUDY DESIGN

This was a repeated cross-sectional analysis of US vital statistics Live Birth/Infant Death linked data from 2011 to 2020. All pregnancies at 20 weeks or greater were included. Our primary outcome was severe maternal morbidity (SMM), defined as any maternal intensive care unit admission, transfusion, uterine rupture, or hysterectomy. Outcomes were compared between pregnancies with a specific type of fetal anomaly and pregnancies without any fetal anomaly. Fetal anomalies that were available in the dataset included anencephaly, meningomyelocele/spina bifida, cyanotic congenital heart disease, congenital diaphragmatic hernia, omphalocele, gastroschisis, cleft lip and/or palate, hypospadias, limb anomaly, and chromosomal disorders. If a fetus had more than one anomaly, it was classified as multiple anomalies. Adjusted relative risks (aRR) with 99% confidence intervals (99% CI) were calculated using modified Poisson regression. Adjusted risk differences (aRDs) were calculated using the marginal standardization form of predictive margins.

RESULTS

Of 35,760,626 pregnancies included in the analysis, 35,655,624 pregnancies had no fetal anomaly and 105,002 had isolated or multiple fetal anomalies. Compared to pregnancies without fetal anomaly, all fetal anomalies were associated with an increased risk of SMM except for gastroschisis and limb anomaly in order of aRRs (99% CI): 1.58 (1.29-1.92) with cleft lip and/or palate; 1.75 (1.35-2.27) with multiple anomalies; 1.76 (1.18-2.63) with a chromosomal disorder; 2.19 (1.82-2.63) with hypospadias; 2.20 (1.51-3.21) with spina bifida; 2.39 (1.62-3.53) with congenital diaphragmatic hernia; 2.66 (2.27-3.13) with congenital heart disease; 3.15 (2.08-4.76) with omphalocele; and 3.27 (2.22-4.80) with anencephaly. Compared to pregnancies without fetal anomaly, all fetal anomalies were associated with an increased absolute risk of SMM except for gastroschisis and limb anomaly in order of aRDs (99% CI): 0.26 (0.12-0.40) with cleft lip and/or palate, 0.34 (0.13-0.55) with multiple anomalies, 0.34 (0.02-0.66) with a chromosomal disorder, 0.54 (0.36-0.72) with hypospadias, 0.54 (0.17-0.92) with spina bifida, 0.63 (0.21-1.05) with congenital diaphragmatic hernia, 0.75 (0.56-0.95) with congenital heart disease, 0.97 (0.38-1.56) with omphalocele, and 1.03 (0.46-1.59) with anencephaly.

CONCLUSION

The presence of fetal anomalies is associated with adverse maternal health outcomes. The risk of SMM varies according to the type of fetal anomaly. Counseling mothers about the maternal implications of fetal anomalies is paramount to help them make informed decisions regarding their pregnancy outcome.

Fetal major anomalies and related maternal, obstetrical, and neonatal outcomes

PURPOSE

To examine maternal, obstetrical, and neonatal outcomes of pregnancies complicated by major fetal anomalies.

METHODS

A 10 year retrospective cohort study at a tertiary university hospital compared maternal and obstetrical outcomes between women with singleton pregnancies complicated by major fetal anomalies, and a control group with non-anomalous fetuses.

RESULTS

For the study compared to the control group, the median gestational age at delivery was lower: 37.0 vs. 39.4 weeks (p < 0.001); and the preterm delivery rates were higher, both at < 37 weeks (46.2 vs. 6.2%, p < 0.001) and < 32 weeks (15.4 vs. 1.2%, p < 0.001). For the study compared to the control group, the placental abruption rate was higher (6.8 vs. 0.9%, p = 0.002); 87.5 vs. 100% occurred before labor. For the respective groups, the mean gestational ages at abruption were 32.8 ± 1.3 and 39.9 ± 1.7 weeks (p = 0.024); and cesarean section and postpartum hemorrhage rates were: 53.8 vs. 28.3% (p < 0.001) and 11.3 vs. 2.8% (p = 0.001), respectively. For the respective groups, hypertensive disorders of pregnancy rates were 9.5 vs. 2.1% (p = 0.004), stillbirth rates were 17.1 vs. 0.3% (p < 0.001), and neonatal death rates 12.5 vs. 0.0% (p < 0.001). Major fetal anomalies were found to be associated with adverse maternal outcomes (OR = 2.47, 95% CI 1.50-4.09, p < 0.001). Polyhydramnios was identified as an independent risk factor in a multivariate analysis that adjusted for fetal anomalies, conception by IVF, and primiparity for adverse maternal outcomes (OR = 4.7, 95% CI 1.7-13.6, p < 0.001).

CONCLUSIONS

Pregnancies with major fetal anomalies should be treated as high-risk due to the increased likelihood of adverse maternal and neonatal outcomes.

Medical Implications of Restricting Abortions on Women Diagnosed With Fetal Anomalies Following the Overturn of Roe v. Wade: A Scoping Review

This scoping review addresses the potential maternal health outcomes of abortion restrictions in the U.S. by studying and analyzing the reported effects of abortion bans or limitations globally. The goal was to examine the medical implications for pregnant women who are unable to abort fetuses that have severe medical anomalies due to imposed restrictions. EMBASE, Medline, and CINAHL databases were searched for studies published in English concerning the medical implications of abortion restrictions in any country prior to the overturn of Roe v. Wade in 2022. For the search criteria using Boolean operators, keywords included the terms "fetal anomaly," "abortion ban," and "implications." Inclusion criteria incorporated studies published between 1980 and 2021, and controlled experimental research studies aimed to evaluate interventions were excluded. This resulted in 469 records initially found. Duplicate records were removed, and two separate tier reviews were conducted. Eleven reviewers independently screened abstracts and titles of 332 records to ascertain eligibility. Eligibility included pregnant women diagnosed with fetal anomalies, women denied access to safe abortions, and the maternal and fetal medical impacts of this. Three reviewers in the second screening independently read 36 full articles to further assess eligibility, resulting in 14 articles in the final review. Findings from this study showed that abortion bans in countries around the world have led to health complications in women seeking illegal abortion services, a decline in maternal mental health, including stress and depression, various medical complications such as obstructed labor, and an increase in high-risk fetuses born with severe deficits. The findings of this review portend similar negative consequences to be experienced by women who are subject to stricter abortion laws in the U.S.

First and Second Stage Labor Management: ACOG Clinical Practice Guideline No. 8

PURPOSE

The purpose of this document is to define labor and labor arrest and provide recommendations for the management of dystocia in the first and second stage of labor and labor arrest.

TARGET POPULATION

Pregnant individuals in the first or second stage of labor.

METHODS

This guideline was developed using an a priori protocol in conjunction with a writing team consisting of one maternal-fetal medicine subspecialist appointed by the ACOG Committee on Clinical Practice Guidelines-Obstetrics and two external subject matter experts. ACOG medical librarians completed a comprehensive literature search for primary literature within Cochrane Library, Cochrane Collaboration Registry of Controlled Trials, EMBASE, PubMed, and MEDLINE. Studies that moved forward to the full-text screening stage were assessed by the writing team based on standardized inclusion and exclusion criteria. Included studies underwent quality assessment, and a modified GRADE (Grading of Recommendations Assessment, Development, and Evaluation) evidence-to-decision framework was applied to interpret and translate the evidence into recommendation statements.

RECOMMENDATIONS

This Clinical Practice Guideline includes definitions of labor and labor arrest, along with recommendations for the management of dystocia in the first and second stages of labor and labor arrest. Recommendations are classified by strength and evidence quality. Ungraded Good Practice Points are included to provide guidance when a formal recommendation could not be made because of inadequate or nonexistent evidence.

Adverse maternal outcomes associated with major fetal malformations after singleton live birth

BACKGROUND

Major fetal malformations complicate 2% to 5% of live births. It is unclear what effect fetal malformations have on severe maternal morbidity.

OBJECTIVE

This study aimed to compare maternal outcomes between individuals with a fetus with major or minor fetal malformations and those with a fetus without major or minor fetal malformations.

STUDY DESIGN

This was a secondary analysis of the Consortium on Safe Labor database. Our study was limited to the current analysis of pregnant individuals with a singleton live birth. Major fetal malformations based on the Centers for Disease Control and Prevention's criteria were defined. Fetal malformations that did not meet the criteria for major fetal malformations were categorized as minor fetal malformations. Our primary maternal outcome was severe maternal morbidity as defined by the Centers for Disease Control and Prevention. Missing values were imputed by multiple imputation using the k-nearest neighbor imputation method. Poisson regression with robust error variance was used to obtain adjusted relative risks with 95% confidence intervals, controlling for confounders.

RESULTS

Of 216,881 deliveries, there were 201,860 cases (93.1%) with no congenital malformation, 12,106 cases (5.6%) with minor fetal malformations, and 2845 cases (1.3%) with major fetal malformations. Compared with individuals with no fetal malformation, those with major fetal malformations were more likely to have severe maternal morbidity (0.7% vs 1.2%; adjusted relative risk, 1.51; 95% confidence interval, 1.07-2.12), postpartum hemorrhage (3.6% vs 6.9%; adjusted relative risk, 1.76; 95% confidence interval, 1.50-2.06), preeclampsia (5.1% vs 8.3%; adjusted relative risk, 1.48; 95% confidence interval, 1.31-1.67), and cesarean delivery (26.7% vs 42.3%; adjusted relative risk, 1.51; 95% confidence interval, 1.45-1.58). Compared with individuals with no fetal malformation, those with minor fetal malformations were more likely to have severe maternal morbidity (0.7% vs 1.4%; adjusted relative risk, 1.73; 95% confidence interval, 1.48-2.02), maternal death (0.01% vs 0.03%; adjusted relative risk, 4.50; 95% confidence interval, 1.18-17.19), postpartum hemorrhage (3.6% vs 6.1%; adjusted relative risk, 1.54; 95% confidence interval, 1.41-1.68), preeclampsia (5.1% vs 8.6%; adjusted relative risk, 1.50; 95% confidence interval, 1.41-1.60), superimposed preeclampsia (1.2% vs 2.4%; adjusted relative risk, 1.25; 95% confidence interval, 1.14-1.38), cesarean delivery (26.7% vs 39.6%; adjusted relative risk, 1.38; 95% confidence interval, 1.35-1.41), chorioamnionitis (3.0% vs 4.7%; adjusted relative risk, 1.41; 95% confidence interval, 1.29-1.53), and postpartum endometritis (0.6% vs 1.0%; adjusted relative risk, 1.58; 95% confidence interval, 1.31-1.90).

CONCLUSION

Major and minor congenital fetal malformations are independent risk factors for severe maternal morbidity and other pregnancy complications.

Evidence-Based Approaches to Labor Induction

Importance

The induction rate continues to increase in the United States placing pressure on the health care system with increasing cost and time spent on labor and delivery. Most labor induction regimens have evaluated uncomplicated singleton-term gestations. Unfortunately, the optimal labor regimens of medically complicated pregnancies have not been well described.

Objective

The aim of this study was to review the current available evidence regarding the various labor induction regimens and understand the evidence that exists for induction regimens in complicated pregnancies.

Evidence Acquisition

Data were acquired by a literature search on PubMed, ClinicalTrials.gov, the Cochrane Review database, the most recent American College of Obstetricians and Gynecologists practice bulletin on labor induction, and a review of the most recent edition on widely used obstetric texts for key words related to labor induction.

Results

Many heterogeneous clinical trials exist examining various labor induction regimens such as prostaglandin only, oxytocin only, or a combination of mechanical dilation with prostaglandins or oxytocin. Several Cochrane systematic reviews have been performed, which suggest a combination of prostaglandins and mechanical dilation results in an improved time to delivery when compared with single-use methods. Evaluating pregnancies complicated by maternal or fetal conditions, there exist retrospective cohorts describing significantly different labor outcomes. Although a few of these populations have planned or active clinical trials, most do not have an optimal labor induction regimen described.

Conclusions and Relevance

Most induction trials are significantly heterogeneous and limited to uncomplicated pregnancies. A combination of prostaglandins and mechanical dilation may result in improved outcomes. Complicated pregnancies have significantly different labor outcomes; however, almost none have well-described labor induction regimens.

Maternal Outcomes of Ongoing Pregnancies Complicated by Fetal Life-Limiting Conditions

OBJECTIVE

This study aimed to examine maternal outcomes of ongoing pregnancies complicated by fetal life-limiting conditions.

STUDY DESIGN

This was a retrospective matched cohort study of women with a diagnosis of fetal life-limiting condition between 2010 and 2018 in a single academic center. Cases were matched to controls (women who had normal fetal anatomic survey) according to year of delivery, body mass index, and parity in a 1:4 ratio. Bivariable and multivariable analyses were performed to compare the prevalence of the primary composite outcome, which included any one of the following: preeclampsia, gestational diabetes, cesarean delivery, third and fourth degree laceration, postpartum hemorrhage, blood transfusion, endometritis or wound infection, maternal intensive care unit admission, hysterectomy and maternal death, between cases and controls.

RESULTS

During the study period, we found 101 cases that met inclusion criteria, matched to 404 controls. The rate of the composite maternal outcome did not differ between the two groups (39.6 vs. 38.9%, p = 0.948). For individual outcomes, women with diagnosis of fetal life-limiting condition had higher rates of blood transfusion (2.0 vs. 0%, p = 0.005) and longer length of the first stage of labor (median of 12 [6.8-22.0] hours vs. 6.6 [3.9-11.0] hours; p < 0.001). In a multivariable analysis, first stage of labor continued to be longer by an average of 6.48 hours among women with a diagnosis of fetal life-limiting condition compared with controls.

CONCLUSION

After controlling for confounding factors, except a longer first stage of labor, women diagnosed with fetal life-limiting conditions who continued the pregnancy did not have a higher rate of adverse maternal outcomes.

KEY POINTS

· The rates of ongoing pregnancies with fetal life-limiting conditions are increasing.. · Women with ongoing pregnancies with fetal life-limiting conditions had longer first stage of labor.. · The rest of the adverse maternal outcomes were not increased in this obstetric population..