How common is placenta previa?

2 Answers
Sep 29, 2016

Placenta Previa are common in the 20th week of most pregnancies, but sometimes it can happen during later times in pregnancies.

Oct 15, 2016

Placenta previa affects about 1 in 200 women in the third trimester of pregnancy.


Placenta previa is a condition in which the placenta is lying unusually low in the uterus, next to or covering the cervix.

Only about 1 in 200 women who have a low-lying placenta detected before 20 weeks still have it when they deliver their baby.

However, a placenta that completely covers the cervix is likely to stay that way.

When it's time to deliver, the woman will need a C-section, because the placenta blocks the baby's way out.

Even if the placenta is only bordering the cervix, a C-section will be necessary in most cases because the placenta can bleed profusely as the cervix dilates.