孕前肥胖与增加妊娠一些不利结局危险有关，然而，在瘦、正常或稍超重妇女中其危险性规律不很清楚。方法研究对象为1992～1993年间瑞典167750名妇女，研究她们孕前身体质量指数与晚胎儿死亡、早新生儿死亡、早产、妊娠年龄小婴儿生产等发生率关系。根据身体质量指数妇女分类如 Pre-pregnancy obesity is associated with increased risk of some unfavorable outcome in pregnancy, however, the risk profile is not clear in thin, normal or slightly overweight women. Methods The subjects studied were 167,750 women in Sweden from 1992 to 1993, and studied the relationship between the body mass index before pregnancy and the incidence of late fetal death, early neonatal death, premature birth and baby of gestational age. According to the body mass index women classified as