The study was performed on 711 newborn infants delivered at the Chosun University Hospital, during 1 year from Jan. 1, 1978 to Dec. 31, 1978.
The results were as follows:
1. The male to female ratio was 1.18:1
The average newborn infant weight was 3.32kg (boy : 3.42kg, girl : 3.19kg) Incidence of low birth weight in infants was 5.6% (boy : 3.6%, girl : 7.9%)
Incidence of excessive-in weight infants was 3.1 % (boy : 3.6%, girl : 2.5%)
2. In the relationship between mother´s age and newborn infant´s birth weight, the lowest incidence of low birth weight and excessive-in weight infants was in the 20-24 years old group. The 30-34 years old group had the heaviest average birth weight. (3.34kg)
3. In the relationship between gestational period and birth weight of newborn infants, and the average incidence of low birth weight infant was 40% in the 26 weeks or less was 11.3% in the 37-42 weeks period or more.
4. In the relationship between birth order and newborn infant birth weight, the 3rd group had the heaviest average birth weight, the lowest incidence of low birth weight infants was the 3rd group, and the highest incidence of excessive in weight infants was the 4th group.
5. In the relationship between history of abortion & low birth weight infants, and newborn infant´s birth weight, incidence of low birth weight infants and excessive-in weight infants was higher as frequency increased.
6. In the relationship between gestational period & Apgar score, the highest Apgar score appeared in the period from 37 to 42 weeks.
7. In the relationship between delivery type and Apgar score, the lowest Apgar score was shown in the vacuum delivery, but normal delivery had the highest score.
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