在正常妊娠过程中,阴道是不会流血的。如果出现阴道流血,并伴有腹痛,那就要考虑异常妊娠了。异常妊娠引起阴道流血的原因有以下7种: 早期流产发生在妊娠12周前,因妊娠早期孕酮分泌不足或其他因素,导致胚胎绒毛滋养细胞发育不良引起。因为发育不良的胎盘绒毛与蜕膜(子宫蜕膜)剥离,血窦被开放而致出血,呈月经样或为点点滴滴的血性 During normal pregnancy, the vagina will not bleed. If vaginal bleeding, accompanied by abdominal pain, it is necessary to consider abnormal pregnancy. Abortion caused by vaginal bleeding due to the following seven kinds: Early abortion occurred in 12 weeks before pregnancy, due to lack of secretion of progesterone during the first trimester of pregnancy or other factors, leading to embryonic villous trophoblast dysplasia. Because of dysplastic placental villi and decidua (uterine decidua) stripping, sinusoids are open and cause bleeding, menstrual-like or bloody bit by bit