Changes in menstrual symptoms among sterilized and comparison women: a prospective study.

Changes in menstrual parameters after tubal sterilization were analyzed in ethnically diverse, poor women from three geographic areas in the United States. Two large suitable comparison groups were similarly studied. Menstrual cycles, duration of menstrual flow, and bleeding between periods were unchanged in the sterilization and comparison groups. The prevalence of dysmenorrhea increased in 10.8% of sterilized women, compared with 2.1% in the comparison groups. This difference was even more significant--16.4 and -0.5%--when usage of oral contraceptives and intrauterine devices was discounted. There was a nonsignificant increase in noncyclic pelvic pain.