"Incidence 0.5%
Types:
- Low lying: not covering cervical opening
- Partial: partially covering cervical opening
- Complete: completely covering os
In 90% a previously low-lying placenta moves up to the upper segment
as the uterus grows- by 34th week it is no longer low-lying.
Risk: bleeding threatening to mother and baby.
50% of placenta previa have preterm delivery.
particularly those with complete placenta previa
who may require hysterectomy at delivery.
Fetal Mortality rate =3%
Maternal mortality rate= 0.03% "