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Am J Perinatol 2024; 41(05): 611-617
DOI: 10.1055/a-1745-3118
Original Article

The Association of Twin Chorionicity with Maternal Outcomes

Rachael B. Cowherd
1   Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
2   Department of Obstetrics and Gynecology, Division of Gynecology, Medical University of South Carolina, Charleston, South Carolina
,
Danielle T. Cipres
1   Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
3   Division of Gynecology, Boston Children's Hospital, Boston, Massachusetts
,
Liqi Chen
4   Department of Preventive Medicine (Biostatistics), Northwestern University Feinberg School of Medicine, Chicago, Illinois
,
Olivia H. Barry
1   Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
,
Samantha L. Estevez
1   Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
5   Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, Icahn School of Medicine at Mount Sinai, New York City, New York
,
Lynn M. Yee
1   Department of Obstetrics and Gynecology, Northwestern University Feinberg School of Medicine, Chicago, Illinois
› Institutsangaben Funding L.M.Y. was supported by the Eunice Kennedy Shriver NICHD K12 HD050121 at the time of the research. Research reported in this publication was supported, in part, by the National Institutes of Health's National Center for Advancing Translational Sciences, Grant Number UL1TR001422. The content is solely the responsibility of the authors and does not necessarily represent the official views of the National Institutes of Health. Additionally, this work was supported by an unrestricted grant for resident research from the Friends of Prentice and Northwestern Department of Obstetrics and Gynecology.
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Abstract

Objective Our objective was to investigate the association between maternal outcomes and twin chorionicity in a large, contemporary obstetric population.

Study Design Retrospective cohort study was conducted at a single, large tertiary care center. Prenatal and inpatient records for all individuals with twin gestations were reviewed from 2000 to 2016. Patients with monoamniotic twins, higher-order multiples reduced to twins, multiple sets of twins in the study period, or undetermined chorionicity were excluded. Patients with monochorionic twins were compared with those with dichorionic twins. The co-primary outcomes were gestational diabetes mellitus and hypertensive disorders of pregnancy. Secondary outcomes included cesarean delivery, preterm delivery, postpartum hemorrhage, and other maternal outcomes. Bivariate and multivariate analyses were performed to assess associations of chorionicity with maternal outcomes.

Results Of the 2,979 patients eligible for inclusion, 2,627 (88.2%) had dichorionic twin gestations and 352 (11.8%) had monochorionic twin gestations. Patients with monochorionic twins were less likely to self-identify as non-Hispanic White and to have conceived via assisted reproductive technology but were more likely to be publicly insured, multiparous and have prenatal care with a maternal–fetal medicine provider. Neither gestational diabetes mellitus (6.8% monochorionic vs. 6.2% dichorionic, p = 0.74; adjusted odds ratio [OR] 1.06, 95% confidence interval (CI) 0.60–1.86) nor hypertensive disorders of pregnancy (21.9% monochorionic vs. 26.3% dichorionic, p = 0.09; adjusted OR 0.99, 95% CI, 0.71–1.38) differed by chorionicity. Of the secondary maternal outcomes, patients with monochorionic twins experienced a lower frequency of cesarean delivery (46.0 vs. 61.8%, p < 0.001), which persisted after multivariate analyses (adjusted OR 0.60, 95% CI 0.46–0.80). There were no differences in preterm delivery, preterm premature rupture of membranes, hemorrhage, hysterectomy, or intrahepatic cholestasis of pregnancy.

Conclusion The odds of gestational diabetes mellitus and hypertensive disorders of pregnancy do not appear to differ by twin chorionicity.

Key Points

  • Hypertensive disorders of pregnancy do not differ by twin chorionicity.

  • Gestational diabetes mellitus does not differ by twin chorionicity.

  • Maternal outcomes are similar for individuals with monochorionic and dichorionic twin gestations.

Keywords

Chorionicity - Dichorionic - Maternal outcomes - Gestational diabetes - Hypertensive disorders of pregnancy - Monochorionic - Twin gestation


Publikationsverlauf

Eingereicht: 29. Juli 2021

Angenommen: 17. Januar 2022

Accepted Manuscript online:
19. Januar 2022

Artikel online veröffentlicht:
21. Februar 2022

© 2022. Thieme. All rights reserved.

Thieme Medical Publishers, Inc.
333 Seventh Avenue, 18th Floor, New York, NY 10001, USA

 

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