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Related Experiment Video

Updated: Jun 20, 2026

Modeling Encephalopathy of Prematurity Using Prenatal Hypoxia-ischemia with Intra-amniotic Lipopolysaccharide in Rats
07:36

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Late preterm birth: how often is it avoidable?

Marium G Holland1, Jerrie S Refuerzo, Susan M Ramin

  • 1Department of Obstetrics, Gynecology and Reproductive Sciences, The University of Texas Medical School, Houston, TX, USA.

American Journal of Obstetrics and Gynecology
|September 1, 2009
PubMed
Summary
This summary is machine-generated.

Late preterm birth (LPTB) indications were analyzed, revealing that 17% of deliveries were potentially avoidable. Most LPTB cases, however, were unavoidable, with less than 10% being purely elective.

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Area of Science:

  • Obstetrics and Gynecology
  • Perinatal Medicine
  • Neonatal Research

Background:

  • Late preterm birth (LPTB), occurring between 34 and 36 weeks of gestation, presents unique challenges in perinatal care.
  • Understanding the indications for LPTB is crucial for optimizing delivery timing and neonatal outcomes.

Purpose of the Study:

  • To delineate the specific indications for late preterm birth (LPTB) deliveries.
  • To quantify the proportion of LPTB that may be considered potentially avoidable.

Main Methods:

  • A retrospective analysis of singleton pregnancies delivered between 34(0/7) and 36(6/7) weeks at a tertiary care center over one year.
  • Delivery indications were classified as spontaneous (spontaneous preterm birth, premature rupture of membranes) or iatrogenic (elective, medically indicated).
  • Potentially avoidable LPTB were identified based on elective or medically stable, high-risk indications.

Main Results:

  • Out of 514 LPTB deliveries, 36.2% were spontaneous preterm births, 17.7% were preterm premature rupture of membranes, 37.9% were medically indicated, and 8.2% were elective.
  • Potentially avoidable LPTB constituted 17% of all LPTB cases.
  • Factors associated with potentially avoidable LPTB included later gestational age (OR 4.7), non-faculty physician status (OR 2.8), and prior cesarean delivery (OR 1.5).

Conclusions:

  • At the studied institution, less than 10% of late preterm births were purely elective.
  • Over 80% of late preterm births were deemed clearly unavoidable based on medical indications.
  • These findings highlight the importance of careful consideration of delivery indications to minimize potentially avoidable late preterm births.