Comparison of urinary estrogens, contraction stress tests and nonstress tests in the management of postterm pregnancy

V. A. Khouzami, J. W.C. Johnson, N. H. Daikoku, J. Rotmensch, E. Hernandez

Research output: Contribution to journalArticlepeer-review

Abstract

In a retrospective review of 697 postterm pregnancies we attempted to validate three tests used to identify the fetus at increased risk: the 24-hour urinary estrogen per gram creatinine (E/Cr), the nonstress test (NST) and the contraction stress test (CST). Using the corrected perinatal mortality rate (PMR) among term pregnancies (0.23%) as a standard for comparison, we found the PMRs among postterm patients with negative screening tests to be as follows: 0.23% with normal E/Crs, 0.65% with negative CSTs (not significantly different) and 2.4% with reactive NSTs (p<0.005). When we used intrapartum fetal distress as a standard for comparison, the E/Cr exhibited the highest sensitivity (88%) whereas those of the CST and NST were much lower (7-10%). The specificities were 63%, 98% and 92%, respectively. From this retrospective study the E/Cr appears to be of most assistance in identifying fetuses at increased risk, the CST is of intermediate assistance, and the NST is of least assistance.

Original languageEnglish (US)
Pages (from-to)189-194
Number of pages6
JournalJournal of Reproductive Medicine for the Obstetrician and Gynecologist
Volume28
Issue number3
StatePublished - Jun 2 1983

ASJC Scopus subject areas

  • Reproductive Medicine
  • Obstetrics and Gynecology

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