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Placental abruption and adverse perinatal outcomes
C V Ananth1, G S Berkowitz, D A Savitz
1Department of Obstetrics, Gynecology and Reproductive Sciences, University of Medicine and Dentistry of New Jersey, Robert Wood Johnson Medical School, New Brunswick 08901-1977, USA. ananthcv@epi.umdnj.edu
JAMA
|November 30, 1999
Summary
Placental abruption significantly increases stillbirth risk, especially with severe separation. Preterm birth is common even with mild abruption, impacting fetal growth.
Area of Science:
- Obstetrics and Gynecology
- Perinatal Medicine
- Reproductive Health
Background:
- Placental abruption is linked to adverse pregnancy outcomes like perinatal death, reduced fetal size, and shorter gestational duration.
- The specific impact of placental separation extent on these outcomes remains unclear.
Purpose of the Study:
- To evaluate the contribution of placental abruption and its extent to stillbirth, preterm delivery, and fetal growth restriction.
- To quantify the risks associated with varying degrees of placental separation.
Main Methods:
- Retrospective cohort study including 53,371 pregnancies from 1986-1996.
- Analyzed risks and relative risks for stillbirth, preterm delivery, and fetal growth restriction in relation to abruption.
- Assessed the impact of placental separation extent on adverse outcomes.
Main Results:
- Placental abruption occurred in 1% of pregnancies, associated with increased risks of stillbirth (aRR 8.9), preterm birth (aRR 3.9), and fetal growth restriction (aRR 2.0).
- Severe placental separation (≥50%) significantly elevated stillbirth risk (aRR 31.5 for 75% separation).
- Even mild placental separation (25%) substantially increased preterm delivery risk (aRR 5.5).
Conclusions:
- Placental abruption profoundly impacts stillbirth, preterm delivery, and fetal growth restriction.
- Severe placental separation dramatically increases stillbirth risk.
- Preterm delivery is a common complication even with less severe placental separation.
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