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The purpose of this study was to evaluate the prolonged labor among the full term deliveries admitted to the Kyungpook National University Hospital between Jan. 1, 1964 and Dec. 31, 1972. By evaluating 288 cases of prolonged labor in its same period, the following results were obtained. 1) The incidence of prolonged labor was 10.7%. 2) Although the peak of their occurences was seen in 25 to 29 years age group, its relative incidence was rather high in the aged and in the young women. 3) The incidence in the primipara was 67% with average age 25.3 years and that of multipara was 33% with 29.1 years in average. 4) The duration of labor was mostly from 24 to 36 hours in primi and multipara inclusively. From 48 to 60 hours in primipara and from 60 to 72 hours in multipara were the duration of labor in the next frequency. 5) The possible cause of prolonged labor was uterine dysfunction (22.4%), C. P. D. (14.0%), overdistention of uterus (11.8%) etc, and the fetal presentation are as follows ; cephalic ; 82.0%, breech ; 13.6%, transverse ; 3.9%. 6) The method of delevery was as follows ; spontaneous delivery ; 45%, forcep delivery ; 11.4%, vacuum extraction ; 42.6%, cesarean section ; 9.2%. 7) The maternal morbidity was seen in 11.3% of all cases. 8) The Apgar score of newborn baby was as follows ; 7-10 ; 60.2%, 1-6 ; 31.5%, 0 ; 8.2% and in many cases, artificial resuscitation was needed.
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