[Rectal and anal straining pressures in primigravidae].

Objective: This study intended to evaluate rectal and anal straining pressures in primigravidae, at simulated defecation.

Methods: The present study is based on 60 women from de Antenatal Care of Santa Casa de Misericórdia - São Paulo. Patients were divided into four groups of 15: a)

Control Group: nuligravidae; b) 1st trimester primigravidae; c) 2nd trimester primigravidae; d) 3rd trimester primigravidae.