Cesarean section and the gestational duration of subsequent pregnancies: A nationwide register-based cohort study.

ABSTRACT:

Introduction

Preterm delivery risk is increased for women with a previous cesarean section, which are becoming more common worldwide. However, this risk is based on studies which have not fully accounted for selection bias, and the studied outcomes have been limited to the study of early deliveries. This study aimed to determine the impact of previous delivery modes on the incidence of deviant duration of subsequent pregnancies.

Material and methods

This retrospective cohort study used clinical data registered in the Swedish Medical Birth Register. 612 935 women with their first two pregnancies and 157 581 women with their first three pregnancies were included. The outcome was the gestational duration of the last pregnancy of the series, depending on previous delivery modes.

SUBMITTER: Evers F 

PROVIDER: S-EPMC11798495 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature