Where is the placenta implanted in placenta previa?

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Multiple Choice

Where is the placenta implanted in placenta previa?

Explanation:
Placenta previa occurs when the placenta implants in the lower uterine segment near or over the cervical os. This position blocks the birth canal, leading to painless vaginal bleeding in the third trimester and often requiring a cesarean delivery. Implantation in the fundus or on the anterior/posterior walls away from the cervix does not involve the cervical os, so those sites are not placenta previa.

Placenta previa occurs when the placenta implants in the lower uterine segment near or over the cervical os. This position blocks the birth canal, leading to painless vaginal bleeding in the third trimester and often requiring a cesarean delivery. Implantation in the fundus or on the anterior/posterior walls away from the cervix does not involve the cervical os, so those sites are not placenta previa.

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