Ultrasonic examination of the uterus.
D005260:Female; D005333:Fetus; D006801:Humans; D006828:Hydatidiform Mole / Q000175:diagnosis*; D010920:Placenta; D011247:Pregnancy; D011272:Pregnancy, Multiple; D014427:Twins; D014465:Ultrasonics; D014594:Uterine Neoplasms / Q000175:diagnosis*; D014599:Uterus / Q000002:abnormalities*