<unk>  is usually from a maternal source, rather than a fetal, one. The maternal source may be a disruption in the vessels of the decidua or a lesion in the cervix or vagina. Vasa praevia is a rare condition that can result in bleeding from the fetoplacental circulation.
Early pregnancy bleeding
Postpartum infections
Obstetrical bleeding
Postpartum bleeding
Recurrent miscarriage
Antepartum bleeding
Drugs in pregnancy
Postcoital bleeding