The prevalence of urinary incontinence (UI) and related urogenital symptoms (UGS) was investigated in a random sample (n = 4206) of women from the 1900-20 birth cohorts residing in the city of Göteborg. It was reported by 16.9% of the respondents that they currently had UI and by 22.7% that they had regularly suffered from this complaint at some time in their lives. The prevalence of UI increased (P less than 0.001) with rising age, from 13.9% in the 1920 birth cohort to 24.6% in the 1900 birth cohort. Over 50% of the sufferers reported daily incontinence. An objective assessment was performed in a subsample (n = 300) of the women complaining of UI. In 14 cases (4.6%) the diagnosis could not be confirmed, while in the remainder UI was classified by type as follows: stress incontinence 24%, urge incontinence 49% and mixed incontinence 27%. The number of urinary tract infections (UTI) reported by the respondents increased (P less than 0.001) with rising age. UGS such as pruritus, burning, pain and vaginal discharge were reported by 11% of the respondents. The reported frequency of local vaginal discomfort did not increase with age, unlike that of UI and UTI. Systemic or local oestrogen treatment was being received by 9.2% of the respondents.