OBJECTIVES Endometriomas are rare in pregnancy. May be difficult to diagnose and may cause significant complications at any stage during gestation. MATERIALS AND METHODS The author presents 2 cases of ovarian endometriomas diagnosed and treated surgically in 14 and 18 weeks of pregnancy. In the first case laparoscopy was performed, in the second case laparoscopy and then laparotomy due to massive adhesions were performed. RESULTS In both cases histopathological examinations showed: cystis picea endometriotica ovarii. Both patients delivered at term. CONCLUSIONS Ovarian endometriomas does not exclude fertility. Surgical management of ovarian endometriomas does not complicate pregnancy course.