Health & Pregnancy
Placenta previa
Normally, the placenta is attached to the uterus above the cervix. When the placenta blocks the cervix, it is called placenta previa. The amount of cervix covered by the placenta may be slight (marginal), moderate (partial), or complete (total). This picture shows a complete placenta previa.
WebMD Medical Reference from Healthwise
Last Updated:
February 23, 2010
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