<unk>  is a complication of pregnancy in which the placenta grows in the lowest part of the womb (uterus) and covers all or part of the opening to the cervix.
The placenta is the organ that nourishes the developing baby in the womb.
Placenta previa
Placenta accreta
Preterm labour
Placental abruption
Preterm labor
Antepartum haemorrhage
Obstetrical hemorrhage
Preterm labor and birth