In terms of human placental disorders, what is placenta previa? A. Penetration of the placenta into uterine muscle B. The cervical os (opening) is covered by the placenta C. When the placenta separates from the uterus prematurely D. Penetration of the placenta into other organs
The correct answer and explanation is:
Correct Answer: B. The cervical os (opening) is covered by the placenta
Explanation:
Placenta previa is a medical condition that occurs during pregnancy when the placenta implants itself in the lower part of the uterus and partially or completely covers the cervix, which is the opening of the uterus into the vagina. This condition can lead to serious complications during pregnancy and delivery, especially if not properly monitored and managed.
In a normal pregnancy, the placenta attaches to the upper part of the uterus, away from the cervix. However, in placenta previa, the abnormal location of the placenta blocks the baby’s path through the birth canal. There are different types of placenta previa, depending on how much of the cervix is covered. These include complete, partial, marginal, and low-lying placenta previa.
The primary symptom of placenta previa is painless vaginal bleeding during the second or third trimester. The bleeding occurs because the cervix begins to thin and open as the body prepares for delivery, causing the blood vessels attached to the placenta to rupture. Since the placenta is low-lying and covers the cervix, any pressure or dilation can result in bleeding.
Diagnosis is typically made through ultrasound imaging, which allows the healthcare provider to see the position of the placenta in relation to the cervix. Management of placenta previa depends on the severity of the condition and the gestational age. In cases where bleeding is heavy or persistent, hospitalization and early delivery by cesarean section may be necessary to protect the health of both the mother and the baby.
Placenta previa can pose risks such as preterm birth, hemorrhage, and the need for blood transfusions. For this reason, regular prenatal care and monitoring are essential for pregnant individuals diagnosed with this condition.