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Chorioamnionitis and uterine function
S P Mark1, M S Croughan-Minihane, S J Kilpatrick
1Departments of Obstetrics, Gynecology and Reproductive Sciences, Family and Community Medicine, Epidemiology and Biostatistics, and the School of Medicine, University of California, San Francisco, San Francisco, California, USA. sarahk@uic.edu
Obstetrics and Gynecology
|June 1, 2000
Summary
Intrapartum chorioamnionitis is linked to increased labor abnormalities, cesarean deliveries, and postpartum hemorrhage. This infection appears to negatively impact uterine function during childbirth.
Area of Science:
- Obstetrics and Gynecology
- Perinatal Medicine
- Infectious Diseases in Pregnancy
Background:
- Intrapartum chorioamnionitis is an infection of the amniotic fluid and membranes.
- Uterine function during labor can be affected by various factors, including infection.
- Understanding the impact of chorioamnionitis on labor and delivery outcomes is crucial for clinical practice.
Purpose of the Study:
- To investigate the association between intrapartum chorioamnionitis and uterine function abnormalities.
- To determine the relationship between chorioamnionitis and labor abnormalities, cesarean delivery rates, and postpartum hemorrhage.
Main Methods:
- Retrospective cohort study of 16,226 deliveries from 1986-1996.
- Analysis of variables including maternal age, gestational age, and chorioamnionitis status.
- Statistical analyses included chi-squared tests, Student t-tests, and logistic regression.
Main Results:
- Women with chorioamnionitis had significantly higher rates of labor abnormalities (RR 2.6-4.1).
- Increased risk of cesarean delivery (RR 3.3) and postpartum hemorrhage (RR 2.1 for vaginal, RR 1.2 for cesarean) in the chorioamnionitis group.
- These associations remained significant after multivariate analysis.
Conclusions:
- Intrapartum chorioamnionitis is significantly associated with adverse labor abnormalities and increased rates of cesarean delivery.
- Chorioamnionitis is linked to a higher risk of postpartum hemorrhage following both vaginal and cesarean deliveries.
- The findings suggest a detrimental effect of chorioamnionitis on overall uterine function during parturition.