<unk>  refers to heavy bleeding during pregnancy, labor, or the puerperium. Bleeding may be vaginal and external, or, less commonly but more dangerously, internal, into the abdominal cavity. Typically bleeding is related to the pregnancy itself, but some forms of bleeding are caused by other events.<unk>  is a major cause of maternal mortality.
Obstetrical hemorrhage
Antepartum haemorrhage
Postpartum hemorrhage
Placental abruption
Preterm labour
Preeclampsia
Preterm labor
Pre-eclampsia