Journal
AMERICAN JOURNAL OF PERINATOLOGY
Volume 26, Issue 1, Pages 63-68Publisher
THIEME MEDICAL PUBL INC
DOI: 10.1055/s-0028-1095182
Keywords
Amniocentesis; cerclage; preterm birth; intra-amniotic infection
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Funding
- Rockefeller Foundation
- United States Agency for International Development
- International Clinical Epidemiology Network3
- Thomas Jefferson University
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We evaluated whether the performance of an amniocentesis in women with a dilated cervix presenting at less than 26 weeks and subsequently managed by a physical exam-indicated cerclage increases the risk of spontaneous preterm birth (PTB) less than 28 weeks. Women between 150/7 to 256/7 weeks' gestation with a dilated cervix (1 to 4 cm) were identified. Multiple exclusion criteria were designated. The primary outcome was PTB less than 28 weeks. One hundred twenty-two women with a dilated cervix between 15 and 256/7 weeks gestational age were identified. Twenty-four (20%) of these had an amniocentesis performed. The unadjusted rate of PTB < 28 weeks differed between women who underwent amniocentesis compared with those who did not (58% versus 34%, respectively, p = 0.02), but after multivariate regression analysis, the performance of an amniocentesis was not an independent contributor to PTB <28 weeks (p=0.90). The performance of an amniocentesis prior to cerclage did not independently contribute to PTB less than 28 weeks.
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