Effect of pregnancy and childbirth on perineal musculature in women with obesity. A longitudinal cohort study.

Objective: Evaluating the changes of the perineal muscles in primigravid women with obesity (BMI ≥ 30) and to compare the progress with primigravid women in normal BMI range.

Methods: A prospective longitudinal cohort study was carried out. The pregnant women were studied at three moments: at 12 weeks' gestation, at 34 weeks' gestation and at 12 weeks after delivery.