V. Missed abortion is diagnosed when products of conception are retained after the fetus has expired. If products are retained, a severe coagulopathy with bleeding often occurs.

• 胎儿已死亡但妊娠物仍滞留在子宫内，称为稽留流产。如果妊娠物滞留，常会发生严重的凝血障碍所导致的出血。