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Is Parity a Risk Factor for Late Preterm Birth? Results from a Large Cohort Study
Lior Kashani-Ligumsky1,2, Ran Neiger3, Ella Segal2
1Department of Obstetrics and Gynecology, Mayanei Hayeshua Medical Center, Bnei Brak 51544, Israel.
Journal of Clinical Medicine
|January 23, 2024
Summary
First-time mothers face higher risks of spontaneous late preterm birth and unplanned cesarean delivery. This increases the likelihood of adverse neonatal outcomes for their babies.
Area of Science:
- Obstetrics and Gynecology
- Neonatal Medicine
- Perinatal Epidemiology
Background:
- Late preterm birth (34-36 weeks gestation) accounts for most preterm births.
- While outcomes are better than earlier preterm births, these infants face increased complication risks.
- Parity, the number of previous births, is a known factor influencing obstetric complications.
Purpose of the Study:
- To investigate the impact of parity on the risk of spontaneous late preterm birth (SLPTB).
- To determine if parity influences the risk of SLPTB-associated neonatal complications.
Main Methods:
- Retrospective observational cohort study.
- Patients categorized into three groups based on parity: primiparas, multiparas, and grandmultiparas.
- Primary outcome: rate of SLPTB. Secondary outcomes included unplanned cesarean delivery (UCD) and composite adverse neonatal outcome (CANO).
Main Results:
- Primiparas had a significantly higher rate of SLPTB compared to multiparas and grandmultiparas.
- Primiparas also showed increased likelihood of UCD and CANO compared to multiparas.
- No significant difference in UCD rates was observed between primiparas and grandmultiparas.
Conclusions:
- First-time mothers (primiparas) are at a greater risk for spontaneous late preterm birth and unplanned cesarean delivery.
- This elevated risk in primiparas is associated with a higher incidence of adverse neonatal outcomes.
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