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The study was carried out retrospectively based on the clinical charts of 973 patients who had cesarean sections performed, and 981 newborns including 8 pairs of twins delivered at Dept. of Obst. & Gyn., College of Medicine, Yonsei University from January 1, 1961 to December 31, 1971. The result obtained were as follows : 1) Cesarean section rate was 8.1% for the period. 2) Among the indications for cesarean section, the previous cesarean section was the most prevalent (32.8%), and the others were cephalopelvic disproportion (31.7%), malpresentation (10.7%) in order. 3) In the types of operation, lower cervical transverse type was most common (92.7%) and classical type was only 6.5%. 4) Of 221 combined operations with cesarean section, tubal ligations were perfomed in 197 cases. 5) The general anesthesia was major type and its rate was 76.1%, and spinal anesthesia was 21.9% and so on. 6) It was found that meternal mortality was 0.5% and the morbidity was 30.7%. 7) Maternal morbidity rate was increased as the duration of rupture of membranes was extended. Particulary the group of more than 12 hours after rupture of membrane were higher greatly than the group of less than 12 hours. 8) Perinatal morbidity was 8.15%.
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