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Placenta praevia: does uterine activity cause bleeding?

E F Magann1, C A Johnson, K S Gookin

  • 1Department of Obstetrics and Gynaecology, University of Mississippi Medical Center, Jackson 39216-4505.

The Australian & New Zealand Journal of Obstetrics & Gynaecology
|February 1, 1993
PubMed
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Increased uterine activity did not consistently precede bleeding in women with central placenta previa. Most patients experienced preterm delivery, highlighting risks associated with this condition.

Area of Science:

  • Obstetrics and Gynecology
  • Maternal-Fetal Medicine
  • Perinatal Research

Background:

  • Central placenta previa is a high-risk obstetric condition.
  • Bleeding complications are common in pregnancies with placenta previa.
  • The relationship between uterine activity and bleeding in central placenta previa requires further investigation.

Purpose of the Study:

  • To investigate whether increased uterine activity precedes bleeding episodes in women with central placenta previa.
  • To analyze the timing of uterine activity changes relative to hemorrhage.
  • To assess the incidence of preterm delivery in this patient group.

Main Methods:

  • Prospective monitoring of 22 women with central placenta previa from >24 weeks gestation.
  • Continuous uterine activity monitoring and recording of bleeding episodes.

Related Experiment Videos

  • Gestational age at bleeding onset and delivery was documented.

    • Main Results:

    • All 22 subjects experienced at least one hemorrhage; 86% delivered preterm.
    • The average gestational age at first bleeding was 29.1 weeks and at delivery was 34.3 weeks.
    • While 41% of women showed increased uterine activity before bleeding, this was not statistically significant across all patients.

    Conclusions:

    • Increased uterine activity is not a reliable predictor preceding bleeding in central placenta previa.
    • Central placenta previa is strongly associated with preterm delivery.
    • Further research is needed to understand the mechanisms of bleeding in placenta previa.