胎儿出生体重达到或超过4000 g称为巨大胎儿。近年来由于围生期营养保健的改善,孕妇注重休息、营养摄入增多、运动减少,遗传、过期妊娠等因素而致巨大胎儿的孕妇有逐年增多趋势,国内资料报道巨大胎儿发生率已占出生总数的7%,有逐年上升的趋势[1]。巨大胎儿可造成头盆不称、难产,处理不当可发生严重的母儿并发症,造成较大危害。 Fetal birth weight of 4000 g or more is called a huge fetus. In recent years, due to perinatal nutrition and health improvement, pregnant women pay attention to rest, increased nutritional intake, exercise, genetic, overdue pregnancy and other factors caused a huge fetus pregnant women have increased year by year, the domestic data reported a huge fetus has accounted for the birth rate 7% of the total, there is a trend of increasing year by year [1]. Huge fetus can cause head basin is not known, dystocia, improper handling can occur serious complications of maternal and child, resulting in greater harm.