The conclusions of Groutz et al must be interpreted with extreme prudence. An accurate response to the two questions asked by the authors would require to compare, in a cohort of young women of the same age before their first pregnancy, the prevalence of SUI several years later (at the same age for all the women) as a function of parity, age at first delivery and mode of delivery and to analyse, in a randomised trial (elective cesarean versus vaginal delivery) the effect of cesarean according to the woman’s age.