Normally, the placenta is attached to the uterus away from 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.
Primary Medical Reviewer
Sarah Marshall, MD - Family Medicine
Specialist Medical Reviewer
William Gilbert, MD - Maternal and Fetal Medicine
Current as of
April 3, 2013
WebMD Medical Reference from Healthwise
April 03, 2013
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