<unk> <unk>  AE) is an obstetric complication in which the placenta has attached to the uterine wall close to or covering the cervix . It can some times occur in the latter part of the first trimester, but usually during the second or third. It is a leading cause of antepartum haemorrhage (vaginal bleeding).  It affects approximately 0.5% of all labours.
Placenta previa
Placenta accreta
Preterm labour
Placental abruption
Preterm labor
Antepartum haemorrhage
Obstetrical hemorrhage
Preterm labor and birth