Effect of coitus at term on length of gestation, induction of labor, and mode of delivery.

Objective: To determine coital incidence at term and to estimate its effect on labor onset and mode of delivery.

Methods: Healthy women with uncomplicated pregnancies and established gestational age were recruited to keep a diary of coital activity from 36 weeks of gestation until birth and to answer a short questionnaire. Two hundred women with complete coital diaries were available for analysis.