Afterfortyweeksofpregnancy,orabouttwohundredandeightydays,theexpectantmothergoesintolabor.Awomanofeighttoninemonthsofpregnancymaynoteadullpainintheabdomen,yetbefreeofothersymptomsofimpendingbirth.Thisdullpainwillthenspontaneouslydisappear.Itisalsopossible (共 1802 字) [阅读本文] >>