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Related Experiment Videos

Unexplained elevations of maternal serum alpha-fetoprotein.

V L Katz1, N C Chescheir, R C Cefalo

  • 1Department of Obstetrics and Gynecology, School of Medicine, University of North Carolina, Chapel Hill 27599-7570.

Obstetrical & Gynecological Survey
|November 1, 1990
PubMed
Summary

Elevated maternal serum alpha-fetoprotein (AFP) levels, even without congenital anomalies, indicate higher risks for low birthweight, placental abruption, and perinatal mortality. Careful fetal growth monitoring is crucial for these pregnancies.

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Area of Science:

  • Obstetrics and Gynecology
  • Prenatal Diagnostics
  • Maternal-Fetal Medicine

Background:

  • Alpha-fetoprotein (AFP) is a key marker in prenatal screening for congenital anomalies.
  • Elevated maternal serum AFP (MSAFP) can indicate adverse pregnancy outcomes even when anomalies are ruled out.

Purpose of the Study:

  • To investigate the association between unexplained elevated MSAFP and adverse pregnancy outcomes.
  • To highlight the risks associated with unexplained MSAFP elevations in singleton and twin gestations.

Main Methods:

  • Analysis of data from over 225,000 screened pregnancies.
  • Inclusion of high-resolution ultrasound and amniocentesis in anomaly exclusion.
  • Consideration of twin gestations with MSAFP elevations.

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Main Results:

  • Unexplained MSAFP elevation is linked to a 2-4 fold increase in low birthweight.
  • Associated with up to 10-fold increases in placental abruption and perinatal mortality.
  • Approximately 20-38% of women with unexplained MSAFP elevation experience adverse outcomes.

Conclusions:

  • Elevated MSAFP, even without detected anomalies, signifies increased pregnancy risks.
  • Potential placental leakage of AFP is a likely cause in complicated pregnancies.
  • Continuous fetal growth evaluation is recommended for managing unexplained MSAFP elevations.