通常把出生后未满 1年的死亡称为婴儿死亡。以每千名的比率计算。据统计结果来看 ,婴儿生存很大程度上受母体健康状况、养育条件等影响。因此 ,婴儿死亡率能在一定程度上反映被调查地区的卫生状况 ,同时也包含经济、教育的社会状况。日本的婴儿死亡率 ,192 5年是 15 0‰以上 ,1 Deaths less than one year after birth are usually called infant deaths. Calculated at the rate of 1,000. According to the statistical results, the survival of infants is largely influenced by maternal health conditions and parenting conditions. Therefore, the infant mortality rate can reflect the health status of the surveyed area to a certain extent, and it also includes the economic and educational social conditions. The infant mortality rate in Japan is 1500 or more for 15 years, 1