A Computer progrem which performs obstetric calculations on Clipper Language using the datas from ultrasonography was developed for personal computer. It was designed for fast assessment of fetal development, prdiction of gestational age, and weight from ultrasonographic measurements wihich included biparietal diameter, femur length, gestational sac, occipito-frontal diameter, abdominal diameter, and etc. The Obstetricel-UI-trasound Data-Base Management System was very useful iln patient management with its convenient data filing, easy retrieval of previous report, prompt but accurate estimation of fetal growth and skeletal anomaly and production of equation and growth curve for pregnant women.