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A 26-year-old woman experiences episodes of bright red vaginal bleeding at week 28, week 32 and week 34 of pregnancy. The bleeding spontaneously subsided each time. Using ultrasound, the placenta is located in the lower right portion of the uterus over the internal OS.

Asked by Elian, Last updated: Dec 18, 2024

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1 Answer

John Smith

Answered Sep 09, 2016

Placenta previa-vaginal bleeding after 20 weeks of pregnancy is the primary symptom of placenta previa. the placenta normally attaches to the upper portion of the uterus which is more muscular and stronger to support the placenta. however, in placenta previa the placenta attaches to the lower portion of the uterus which is weaker, thinner, and more vascular. as you enter your second and third trimester, the cervix begins to thin and stretch in preparation for labor. as this area stretches it can cause the villi (blood vessels) to break therefore causing bleeding. placenta previa can lead to complications for both mother and baby. complications that may arise include placenta abruption, hemorrhaging, preterm labor, anemia for either mother or baby.