Approximately one-third of medically indicated late preterm births are complicated by fetal growth restriction

Carlos A. Carreno, Maged M. Costantine, Marium G. Holland, Susan M. Ramin, George R. Saade, Sean C. Blackwell

Research output: Contribution to journalArticlepeer-review

29 Scopus citations


Objective: The purpose of this study was to report the frequency of fetal growth restriction (FGR) based on indication for late preterm birth (LPTB). Study Design: Singleton live born pregnancies that were delivered from 34-36 weeks 6 days of gestation over a 1-year period at a tertiary care medical center were studied. Indications for delivery were categorized as spontaneous (spontaneous preterm birth or premature rupture of membranes), medically indicated, or elective. A customized birthweight percentile was calculated for each pregnancy; the rate of FGR was compared based on indication for LPTB. Results: There were 482 LPTBs that met all criteria. Customized birthweight percentiles (median; interquartile range) were different among groups (spontaneous, 45.5%; 20.873.5%; medically indicated, 26.9%; 4.163.6%; elective, 45.9%; 22.278.3%; P = .001). The rate of FGR was also different among groups (spontaneous, 13%; medically indicated, 32%; elective, 21%; P = .001). Conclusion: With the use of customized birthweight standards, we found that FGR complicated approximately one-third of all cases of medically indicated LPTB.

Original languageEnglish (US)
Pages (from-to)263.e1-263.e4
JournalAmerican journal of obstetrics and gynecology
Issue number3
StatePublished - Mar 2011

ASJC Scopus subject areas

  • Obstetrics and Gynecology


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