Structural Anomalies in Multifetal Gestations

Elizabeth A. Hoover, Yasuko Yamamura, Gwyneth Thompson

Research output: Contribution to journalArticlepeer-review


Multifetal gestations are at increased risk for structural anomalies relative to singletons. Determination of chorionicity is critical, as the risk is highest for monochorionic pregnancies. In a singleton gestation, counseling is structured around optimization of fetal outcomes and careful consideration of the patient's choices in management decisions. However, in multifetal gestations affected by a fetal anomaly, complex counseling with consideration for the pregnancy as a whole is necessary. We review the incidence of structural anomalies in twins and highlight unique considerations including selective termination for discordant anomalies. We emphasize the role of shared decision making between provider and patient.

Original languageEnglish (US)
Pages (from-to)781-791
Number of pages11
JournalClinical Obstetrics and Gynecology
Issue number4
StatePublished - Dec 1 2023

Bibliographical note

Publisher Copyright:
© 2023 Lippincott Williams and Wilkins. All rights reserved.


  • multifetal gestation
  • selective termination
  • structural anomaly
  • twins

PubMed: MeSH publication types

  • Review
  • Journal Article


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