Screening for preterm birth in twin pregnancies

  • Amanda Roman
    Correspondence
    Corresponding author: Amanda Roman, MD, Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Thomas Jefferson University, 833 Chestnut Street, First floor, Philadelphia, PA, 19107 USA, Phone: 215-955-9200, Fax: 215-955-5041.
    Affiliations
    Maternal Fetal Medicine Division, Obstetrics and Gynecology Department, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, United States
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  • Alexandra Ramirez
    Affiliations
    Maternal Fetal Medicine Division, Obstetrics and Gynecology Department, Sidney Kimmel Medical College at Thomas Jefferson University, Philadelphia, PA, United States
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  • Nathan S. Fox
    Affiliations
    Maternal Fetal Medicine Associates, PLLC, and The Department of Obstetrics, Gynecology, and Reproductive Science, Icahn School of Medicine at Mount Sinai, 70 East 90th Street, New York, NY 10128, USA
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Published:November 19, 2021DOI:https://doi.org/10.1016/j.ajogmf.2021.100531

      Abstract

      Twins represent 3.2% of all livebirth. However, they account for 20% of all preterm deliveries, with 60% delivering before 37 weeks, and 10.7% before 32 weeks. Twin pregnancies have five times higher risk of early neonatal and infant death related to prematurity. Monochorionic twins have higher incidence of both indicated and spontaneous preterm delivery compared with dichorionic twins. Additional risk factors include history of preterm delivery and cervical surgery. Transvaginal cervical length before 24 weeks is the best tool to predict preterm birth, independent of other risk factors.

      Keywords

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