Final answer:
Abruptio Placenta most commonly occurs in the third trimester of pregnancy.
Step-by-step explanation:
Abruptio placenta, a serious pregnancy complication, typically occurs in the third trimester, starting around week 29 and extending until birth. This critical period witnesses rapid uterine expansion and heightened fetal movements. Abruptio placenta involves the premature separation of the placenta from the uterine wall before delivery, posing risks to both maternal and fetal health. Symptoms include back pain, swelling in the lower extremities, and frequent urination. The condition demands prompt medical attention, as it can lead to significant blood loss, jeopardizing oxygen supply to the fetus. Monitoring for warning signs and immediate intervention are crucial for managing abruptio placenta in the third trimester.