신생아의 체주 및 재태기간에 관한 연구

Abstract

The bedy weight and the duration of pregnancy of the newboru from 989 pregnant women who knew the date of tie last menstruation were analysed and the following conclusions have been drawn. 1. The average of the body weight of the Korean newborn i·: 3212.8 g. 2. The body weight of the male newborn is heavier than that of the female newborn. 3. As to the times of parturition, up to the 4th the body weight of newborn increases gradually, and after the 5th parturition the body weight of newborn decreases on the contrary. 4. As to the correlation between the mother age and the body weight of the newborn, it seems that up to the mother age of 35 the body weight of the newborn indreases with the increasing of mother age and thereafter the body weight of the newborn decreases with the advance of mother age on the contrary. 5. The average of gestation period is 286.9 days. 6. The gestation period of the female newborn is a little longer than that of the male newborn. 7. There is no significant correlation between the times of parturition and the duration of pregnancy. 8. When the mother age is over 36, the duration of pregnancy becomes a little longer.