Association between maternal serum alpha-fetoprotein and adverse outcomes in pregnancies with placenta previa

Erin L. Butler, Jodi S. Dashe, Ronald M. Ramus

Research output: Contribution to journalArticle

17 Scopus citations

Abstract

Objective: To determine whether increased maternal serum alpha-fetoprotein (MSAFP) level at 15-20 weeks' gestation is a marker of adverse outcomes in women with placenta previa at delivery. Methods: We conducted a retrospective cohort study of singleton pregnancies complicated by placenta previa, diagnosed sonographically, and confirmed at delivery. All women had MSAFP screening at 15-20 weeks' gestation and delivered nonanomalous live-born infants at or after 24 weeks' gestation. Results: One hundred seven women with placenta previa delivered during the study. Fourteen (13%, 95% CI 7%, 21%) had MSAFP at least 2.0 multiples of the median (MoM). They were significantly more likely than those with lower MSAFP levels to have one or more of the following outcomes: hospitalization for antepartum bleeding before 30 weeks' gestation (50% versus 15%), delivery before 30 weeks' gestation (29% versus 5%), or preterm delivery for pregnancy-associated hypertension before 34 weeks' gestation (14% versus none). The MSAFP cutoff of 2.0 MoM provided the best combination of sensitivity and specificity for those outcomes, using receiver operating characteristic curves. Conclusion: Women with placenta previa who also have high MSAFP levels are at increased risk of bleeding in the early third trimester and preterm birth. We did not find women who required cesarean hysterectomy, including those with placenta accreta, to consistently have elevated MSAFP.

Original languageEnglish (US)
Pages (from-to)35-38
Number of pages4
JournalObstetrics and gynecology
Volume97
Issue number1
DOIs
StatePublished - Jan 30 2001

ASJC Scopus subject areas

  • Obstetrics and Gynecology

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