New adverse obstetrics outcomes associated with endometriosis: a retrospective cohort study

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Pregnant women with endometriosis showed significantly increased risks of placenta previa, intrahepatic cholestasis, induction of labor, and preterm birth compared to controls.

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This retrospective cohort study at a tertiary hospital (2009–2014) compared obstetric outcomes in 262 pregnant women with endometriosis versus 524 matched controls without endometriosis, with additional stratification by deep infiltrating endometriosis (DIE vs non-DIE) and by singleton spontaneous conception versus multiple pregnancy/assisted reproductive technology. Women with endometriosis had significantly higher risks of placenta praevia, intrahepatic cholestasis of pregnancy (ICP), induction of labor, and preterm birth. DIE patients showed a significantly higher proportion only for preterm birth, whereas non-DIE patients had higher incidences of most complications except placenta praevia, which did not differ, and the multiple/ART subgroup did not differ from controls. Relevance to endometriosis: the paper directly evaluates pregnancy complications associated with endometriosis and reports new adverse outcomes—especially ICP and induction of labor—among affected pregnant patients. This paper is centrally about endometriosis — it assesses incidence of ICP, induction of labor, and other adverse obstetric outcomes in pregnancies complicated by endometriosis.

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Abstract

Purpose The main aim of this study was to evaluate the incidence of endometriosis and intrahepatic cholestasis (ICP) and induction of labor in pregnant women with endometriosis compared with women without endometriosis. The secondary aim was to confirm increased incidence of already known endometriosis-related pregnancy complications in these patients.

Methods

This is a retrospective cohort study performed at a tertiary hospital between January 2009 and December 2014 to compare obstetrics outcome between women with endometriosis and women without endometriosis. Pregnant patients with endometriosis were included in the study group. Patients were divided in the following subgroups: patients with deep infiltrating endometriosis (DIE subgroup) and patients without deep infiltrating endometriosis (non-DIE subgroup); patients with singleton pregnancy and spontaneous conception (subgroup A) and patients with multiple pregnancy and/or patients who underwent assisted reproductive technology (subgroup B). To form a control group, for each patient with endometriosis, two patients without endometriosis were selected as the control group by means of matched sample.

Results

The study population included 262 pregnant women with endometriosis and 524 controls. Patients of the study population had significantly increased risks of placenta praevia (p < 0.05), ICP (p < 0.01), induction of labor (p < 0.01) and preterm birth (p < 0.01). DIE patients had a significantly higher percentage only of preterm birth (p < 0.01), while in non-DIE group all complications had a higher incidence except for placenta praevia, which did not differ with control. Subgroup A had a statistically higher incidence of placenta praevia (p < 0.01), ICP (p < 0.01), induction of labor (p < 0.01) and preterm birth (p < 0.01) compared to its control subgroup. There was no difference in distribution of pregnancy complications between subgroup B and control subgroup.

Conclusions

Our results showed for the first time that women with endometriosis are at higher risk of developing ICP and experiencing an induced labor. Further studies are warranted to clarify whether the history of endometriosis might be taken into account in the antenatal care of these patients. Access this article We’re sorry, something doesn't seem to be working properly. Please try refreshing the page. If that doesn't work, please contact support so we can address the problem. Similar content being viewed by others

References

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Fertil Steril 103:1438–1445. doi:10.1016/j.fertnstert.2015.02.027 Author information Authors and Affiliations Corresponding author Ethics declarations Conflict of interest The authors declare that they have no conflict of interest. Authors state that they have had full control of all primary data and that they agree to allow the Journal to review their data if requested. Research involving human participants and/or animals Ethical approval: All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Informed consent Informed consent was obtained from all individual participants included in the study. Rights and permissions About this article Cite this article Mannini, L., Sorbi, F., Noci, I. et al. New adverse obstetrics outcomes associated with endometriosis: a retrospective cohort study. Arch Gynecol Obstet 295, 141–151 (2017). https://doi.org/10.1007/s00404-016-4222-7 Received: Accepted: Published: Issue date: DOI: https://doi.org/10.1007/s00404-016-4222-7

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Condition tags

mesh:D004715endometriosis

MeSH descriptors

Cholestasis, Intrahepatic Endometriosis Pregnancy Complications Adult Cholestasis, Intrahepatic Cohort Studies Endometriosis Female Humans Incidence Infant, Newborn Pregnancy Pregnancy Complications Retrospective Studies

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