Risk Factors
The following have been identified as risk factors for placenta praevia:
- Previous placenta previa, caesarean delivery, or D&C e.g. used for incomplete or missed miscarriage, abortion, to treat or investigate heavy bleeding or other diagnostic purposes.
- Alcohol use during pregnancy.
- Women who have had previous pregnancies, especially a large number of closely spaced pregnancies, are at higher risk.
- Smoking during pregnancy; cocaine use during pregnancy
- Women who are younger than 20 are at higher risk and women older than 30 are at increasing risk as they get older.
- Women with a large placentae from twins or erythroblastosis are at higher risk.
- Race is a controversial risk factor, with some studies finding that people from Asia and Africa are at higher risk and others finding no difference.
Placenta previa is itself a risk factor of placenta accreta.
Read more about this topic: Placenta Praevia
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