OBJECTIVE: This study was undertaken to investigate the association between maternal age at the first and last delivery, and urinary incontinence later in life. STUDY DESIGN: In the Norwegian EPINCONT study (a substudy of HUNT 2), cross-sectional data on incontinence from 11,397 women aged 20 to 64 years was linked with prospectively obtained data on exposures from the Medical Birth Registry of Norway. Bivariate and multivariate methods were applied. RESULTS: Women 25 years or younger at their first delivery had a lower risk of incontinence than their older counterparts (23% vs 28%, P