Inflammatory bowel disease during pregnancy: management of a disease flare or remission

Inflammatory bowel disease in pregnancy and breastfeeding

Inflammatory bowel disease (IBD) has a peak age of diagnosis before the age of 35 years. Concerns about infertility, adverse pregnancy outcomes, and heritability of IBD have influenced decision-making for patients of childbearing age and their care providers. The interplay between the complex physiology in pregnancy and IBD can affect placental development, microbiome composition and responses to therapy. Current evidence has shown that effective disease management, including pre-conception counselling, multidisciplinary care and therapeutic agents to minimize disease activity, can improve pregnancy outcomes. This Review outlines the management of IBD in pregnancy and the safety of IBD therapies, including novel agents, with regard to both maternal and fetal health. The vast majority of IBD therapies can be used with low risk during pregnancy and lactation without substantial effects on neonatal outcomes.

Maternal Outcomes and Pregnancy-Related Complications Among Hospitalized Women with Inflammatory Bowel Disease: Report from the National Inpatient Sample

BACKGROUND AND AIMS

Previous studies have been inconsistent in reporting the risk of pregnancy-related complications in women with IBD. We aimed to investigate the differences in frequencies of pregnancy-related complications requiring hospitalization in women with IBD compared to women without IBD.

METHODS

We performed a population-based, cross-sectional study using the 2014 USA National Inpatient Sample. Frequencies of ICD-9 codes for pregnancy-related complications in women aged 18-35 years with IBD were compared to women with no IBD controlling for confounders predisposing to pregnancy complications. Adjusted odds ratios were calculated for each outcome.

RESULTS

A total of 6705 women with IBD and a pregnancy complication were discharged from the hospital in 2014. In multivariate analyses, there was no statistically significant difference between women with and without IBD for: spontaneous abortion, post-abortion complications, ectopic pregnancy, hemorrhage, severe preeclampsia, eclampsia, early labor, polyhydramnios, hyperemesis, missed abortion, mental disorder during pregnancy, and forceps delivery. Women with IBD had significant lower odds for prolonged pregnancy, gestational diabetes, fetal distress, umbilical cord complications, obstetric trauma, mild preeclampsia, and hypertension. There was, however, higher odds for infectious and parasitic complications (OR 1.74, 95% CI 1.42-2.14, p < 0.0001), UTIs (OR 1.65, 95% CI 1.07-2.60, p = 0.02), and anemia (OR 5.26, 95% CI 4.01-6.90, p < 0.0001).

CONCLUSIONS

In this large population-based analysis, women with IBD had higher odds for certain infections such as UTIs and anemia during pregnancy when compared to women with no IBD. For other pregnancy-related complications, women with IBD had the same or lower odds than women with no IBD. These data are important to share with women with IBD considering pregnancy.

Biologics for Inflammatory Bowel Disease and Their Safety in Pregnancy: A Systematic Review and Meta-analysis

BACKGROUND & AIMS

Biologics are used routinely in pregnant women with inflammatory bowel disease (IBD), but large-scale data reporting adverse pregnancy outcomes among biologic users are lacking. We sought to estimate the prevalence of adverse pregnancy outcomes in women with IBD on biologic therapies.

METHODS

We searched major databases from inception to June 2020 for studies estimating the prevalence of adverse pregnancy outcomes in IBD when using biologics (anti-tumor necrosis factor [TNF], anti-integrins, and anticytokines). Prevalence and relative risk (RR) were pooled using a random-effects model.

RESULTS

Forty-eight studies were included in the meta-analysis comprising 6963 patients. Biologic therapy in IBD pregnancies was associated with a pooled prevalence of 8% (95% CI, 6%-10%; I2 = 87.4%) for early pregnancy loss, 9% (95% CI, 7%-11%; I2 = 89.9%) for preterm birth, 0% (95% CI, 0%-0%; I2 = 0%) for stillbirth, 8% (95% CI, 5%-10%; I2 = 87.0%) for low birth weight, and 1% (95% CI, 1%-2%; I2 = 78.3%) for congenital malformations. These rates are comparable with those published in the general population. In subgroup analyses of a small number of studies, the prevalence of early pregnancy loss and preterm birth were higher in vedolizumab vs anti-TNF users. Meta-regression did not show an association of disease activity or concomitant thiopurine on adverse outcomes. Continued TNF inhibitor use during the third trimester was not associated with risk of preterm birth (RR, 1.41; 95% CI, 0.77-2.60; I2 = 0%), low birth weight (RR, 1.32; 95% CI, 0.80-2.18; I2 = 0%), or congenital malformations (RR, 1.28; 95% CI, 0.47-3.49; I2 = 0%).

CONCLUSIONS

Adverse pregnancy outcomes among pregnant IBD women using biologics are comparable with that of the general population. PROSPERO protocol #CRD42019135721.

Biologics and pregnancy: a clinician's guide to the management of IBD in pregnant women

Introduction: Women with inflammatory bowel disease (IBD) endorse a tremendous amount of concern about medication exposure during pregnancy and their effects on the fetus. Medical providers caring for this patient population should be well informed and feel comfortable counseling their patients for the best pregnancy outcome possible.Areas covered: It is of particular importance to understand the implications of use of biologics in preconception, pregnancy, and postpartum timeframes. Herein, we aim to inform the clinician about the impact of uncontrolled inflammation during pregnancy, the mechanisms of biologic transport through the placenta, the effects of biologics in maternal and neonatal outcomes, and additional postpartum considerations such as breastfeeding and vaccination safety.Expert opinion: The groundwork already set by previous research in terms of safety of biologic therapy during pregnancy has been reassuring. With the advent of more mechanisms of action but similar protein structure, i.e. they are IgG1 antibodies; the authors anticipate the recommendation of continuation of therapy throughout pregnancy will be sustained.