OBJECTIVE: To estimate the rate of miscarriage and other outcomes in pregnant women presenting with vaginal bleeding during 1. trimester. To evaluate maternal age, prior spontaneous abortion and prior induced abortion as risk factors for spontaneous abortion. To evaluate heavy versus light bleeding, multiple episodes of bleeding and additional pain as predictors of miscarriage. METHOD: Retrospective study of 86 women (with vaginal bleeding in 1. trimester) seeking prenatal care at Sykehuset Buskerud HF january - march 2004. 2 were excluded due to lack of information on outcome. Patients were found through search on differential diagnosis, including diagnosis not depending on pregnancy. Statistics, mainly frequencies, cross tabulations, chi square tests and binominal tests were performed in SPSS. Confounders were not considered/accounted. RESULTS: 56% miscarried, 8,3% were diagnosed with ectopic pregnancy, 35,7% had viable pregnancy at ultrasound screening (week 17-18). Within the last group most had a case of threatened abortion, 1 patient probably bled from a cervical polyp and 1 was likely to bleed from vaginal varices. 69,2% of women > 35 years of age miscarried. This increase was not found statistical significant. The miscarriage rate among patients with ≥ 2 prior abortions 46,7% (spontaneous and/or induced) was less then among those with < 2. 80,8% of patients with heavy bleeding miscarried. Only 26,7% of those with ≥ 2 episodes of bleeding miscarried. CONCLUSION: Rates of the different outcomes are consistent with results from previous studies. So is the impact of heavy bleedings on the miscarriage rate. Results regarding risk factors suggest that the material is too small. Age >35 and prior abortions are factors known to increase the miscarriage rate, but this is not evident in this study.