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Adverse infant outcomes associated with first-trimester vaginal bleeding
M A Williams1, R Mittendorf, E Lieberman
1Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts.
Obstetrics and Gynecology
|July 1, 1991
Summary
First-trimester vaginal bleeding in pregnant women is linked to adverse infant outcomes. This includes higher risks of low birth weight (LBW) and preterm birth, even after accounting for other factors.
Area of Science:
- Obstetrics and Gynecology
- Perinatal Medicine
- Reproductive Health
Background:
- Vaginal bleeding during early pregnancy is a common concern.
- Understanding its impact on infant outcomes is crucial for clinical management.
Purpose of the Study:
- To investigate the association between first-trimester vaginal bleeding and adverse singleton infant outcomes.
- To determine if this association persists after adjusting for confounding variables.
Main Methods:
- A hospital-based study of 11,444 nondiabetic women.
- Assessed outcomes including low birth weight (LBW), shortened gestation, and neonatal death.
- Statistical analysis adjusted for potential confounding factors.
Main Results:
- Women reporting first-trimester bleeding had higher rates of LBW, shortened gestation, and neonatal death.
- First-trimester bleeding significantly increased the risk of preterm birth (adjusted risk ratio = 2.0).
- A 1.6-fold increased risk of term LBW infants was observed in women with first-trimester bleeding.
Conclusions:
- First-trimester vaginal bleeding is a significant correlate of adverse infant outcomes.
- Early pregnancy bleeding warrants careful monitoring due to potential risks to the infant.
- These findings highlight the importance of addressing first-trimester bleeding in prenatal care.