过期妊娠临床上较常见,并影响母儿健康。近年来由于对围产期保健的重视和对胎盘生理机能有了更多的认识,处理上亦较过去积极慎重。本文根据1976年FIGO的规定,妊娠期超过42周以上(即>294天)者,称过期妊娠。但还需注意月经周期、哺乳情 Obsolete pregnancy clinically more common, and affect the health of mothers and children. In recent years, due to the emphasis on perinatal care and the physiological function of the placenta have more understanding, handling is also more cautious than in the past. This article according to the 1976 FIGO regulations, more than 42 weeks of gestation (ie,> 294 days), said expired pregnancy. But also pay attention to the menstrual cycle, breastfeeding