日本1950年的孕产妇死亡率是176.1/10万,但到1983年和1984年已骤降至15.5/10万和15.1/10万。从1983年的实际数字来看,本年日本的出生数为1,508,687人,孕产妇的死亡数是234人,其中绝大部分(202人)是因产科原因死亡的。日本的孕妇母体合并症的管理几乎已达到理想的状态,发生死亡的极少。日本的围产期死亡率在1951年是46.7‰,到1984年激减至8.7‰,围产期死亡的原因因新生儿的出生体重不同而不尽相同,见表1、表2、表3。总地来说围产期死亡的主要原因可概括为表4。其中先天异常、脐带、卵膜、胎盘等附属物异常及母体妊娠异常总计为54.3%,几乎是无救治可能的。另外 RDS 及 RDS 以 Japan’s maternal mortality rate in 1950 was 176.1 / 100,000, but it dropped sharply to 15.5 / 100,000 and 15.1 / 100,000 in 1983 and 1984. According to the actual figures of 1983, the number of births in Japan this year was 1,508,687 and the number of maternal deaths was 234, the vast majority of whom (202) died of obstetric reasons. The management of maternal complications in pregnant women in Japan has almost reached the ideal state with very few deaths. The perinatal mortality rate in Japan was 46.7 ‰ in 1951 and dropped sharply to 8.7 ‰ in 1984. The cause of perinatal death varied with the newborn’s birth weight, as shown in Table 1, Table 2 and Table 3 . In summary, the main causes of perinatal death can be summarized in Table 4. Including congenital anomalies, umbilical cord, egg membrane, placenta and other anomalies and maternal pregnancy abnormalities totaled 54.3%, almost no cure possible. In addition to RDS and RDS