A consensus conference on menstrual disorders concluded that a discrepancy exists between the large number of curettages performed annually on fertile women and the actual findings of cancer of the endometrium in this group of patients. Based on three written simulated consultations (vignettes) with 42-year-old women with metrorrhagia but without increased risk of cancer a decision analysis was performed among 695 general practitioners in Denmark and the Faroe Islands. The first choice of treatment was curettage in 43% of the responders. It was found that a large proportion of doctors decided on curettage when the patient had developed anaemia. The choice of curettage was associated with the doctors' assessment of need to exclude cancer of the endometrium, while doctors who gave high priority to non-invasive treatment and cessation of bleeding were less likely to refer for curettage. A larger proportion of male than female doctors chose curettage as primary treatment.