Abstract
A study was made on the live birth of premature infant in 1958 at Minatoku in Osaka city. The results obtained are as follows.
1. The frequency of premature infant is 10.1% and that of female is higher than that of male.
2. The frequency of premature infant shows the highest rate in spring, the lowest in autumn.
3. The frequency of premature infant by term of pregnancy get as follows; full term 6.9%,9 gravid months 64.3%, and 8 and 7 gravid months 100.0%.
4. The frequency of premature infant is the highest rate in the first babies by birth order.
5. The live birthes of the premature infant are assisted by hospitalized and physician attendant in high rate.
6. In the live birthes of premature infant, abnormal birth gets 41%, which early rupture of bag waters gets 57%.
7. Mothers born the premature infant were found fall sick in alburninurie and hypertension in high rate by legal medical examination for pregnant women.
8.33% of infant death and 41% of neo-natal death are premature infants.
