期盼了十个月的宝宝,却迟迟不肯出来,孕妈妈摸着自己的大肚子,一天比一天焦虑,为什么会发生过期妊娠呢?对妈妈和宝宝会都有哪些不良后果呢?早自然分娩的准确日期难以预知,据统计正好在预产期分娩的大约只占5%,虽然绝大多数宝宝均在孕37周~42周期间足月出生,有些急性子的宝宝孕37周前就呱呱落地了,也有些宝宝孕42周后才姗姗来迟。 Looking forward to a baby for ten months, but still refused to come out, pregnant mothers touched their pregnant belly, anxiety day by day, why there will be expired pregnancy? What are the consequences for mothers and babies? The precise date of birth is difficult to predict, according to statistics, only about 5% of births in the expected period of delivery, although the vast majority of babies are pregnant during the first 37 weeks to 42 weeks of full term birth, some acute child born 37 weeks before pregnancy , But also some babies pregnant 42 weeks late.