Real-time ultrasonographic examinations were performed on 47 with obstetric and gynecologic emergencies at Hirata Municipal Hospital, Japan, from May '84 to September '86. In 45 (sensitivity=95.7%), the ultrasonography presented conclusive evidence to make a diagnosis, but in 2 with pelvic inflammatory disease and endometrial cyst, the correct findings of intrapelvic abnormal pathogenic changes were not depicted. Thus, real-time ultrasound is a pertinent diagnostic tool which can be used to make a correct diagnosis in various obstetric and gynecologic emergencies.