我们对我院1977年1月——1979年12月三年之内,产科入院的全部产妇及其围产儿进行了一次回顾性的调查,报告于下。(一)方法:1．整理病历:凡诊断基本正确、记录大致完整者即进行登记和统计;记录大致完整者2．确定标准:孕周从最末一次月经开始之日起算,最后有不足7天者仍作为一周,围产期为第28孕 We conducted a retrospective survey of all pregnant women and their perinatals admitted to our hospital from January 1977 to December 1979 within three years. The report is presented below. (A) methods: 1. Organize medical records: Where the diagnosis is basically correct, the record is almost complete registration and statistics; record is almost complete 2. To determine the standard: gestational age from the date of the last menstrual start, the last less than 7 days are still as a week, the perinatal period is 28th pregnant