Use of pitoin in obstertrical practice is known to have various advantages among those being induction and augmantation of delivery as a primary indication. However, use of pitocin can be extended to the mothers who are apparently in normal labor with the aim of reduction of the number of painful hours and conversion of night time delivery to day time which is more convernient to the physician and to the safty for the mothers and babies. It will be a great achievement in modern obstetries practice if this management brings no significant harm to the baby or mother. There have been a total of 1780 deliveries gestation over 37 weeks encounted at Cheil Hospital, through December 1963 to july 1967. Among those 1598 cases(89.8%) were delivered vaginaly and 182 cases(10.2%) were managed by Cesarean section. Following this policy the percentage of day deliveries in 714 cases of the augmentation group was increased to 73% (pri,ipara, 277 (77%): Multipara, 243 (68.6%). The duration of labor in the augmentation group also greatly shortened to a figure of hours and 54 minutes in the primipara, and 4 hours and 10 minutes in the multipara which is in contrast to the Korea average duration of labor of 14 hours in the primipara and 7 hours and 30 minutes in the multipara. The number of complications in this series was decreased in comparison to the control group. In this group the corrected fetal mortality was 2 cases (0.21%). 6 cases (0.63%) of fetal distress, 1 case (0.1%) of rupture of the uterus due to use of midforceps and 12 cases (1.2%) of postpartum hemorrhage and there were no cases of maternal mortlity.