What is the difference between placenta previa and placenta anterior wall?

Placenta praevia refers to the position of placenta that is relatively low, covering the cervical orifice or close to it. The anterior placenta refers to the position of placenta in the anterior wall of the uterus. The former is abnormal, while the latter is normal. Placenta praevia is relatively dangerous and should be taken seriously. Pregnant women need to do regular check-ups.