Sonographic determination of fetal gender was attempted prospectively in most pregnancies of more than 26 weeks. We stuided 193 cases of pregnancies with ultrasound for recent 9 months from June 1984 to Feb. 1985 atdepartement of radiology, Soonchunhyang university, Soonchyunhyang chunan hospital, and analysed ultrasonographicfinding of fetal gender. The results were as follows; 1. Overall accuracy rate for fetal gender is 90%. 2.Accuracy rate for male fetus is 97.8%. 3. Accuracy rate for female fetus is 88.2%.