What is described as the premature separation of a normally implanted placenta?

The premature separation of a normally implanted placenta is known as abruptio placenta. This condition refers to the detachment of the placenta from the uterine wall before the delivery of the baby, which can lead to significant complications for both the mother and the fetus, such as bleeding, fetal distress, and preterm birth. The causes can include trauma, hypertension, or other maternal conditions.

Other options, while related to placental issues, refer to different conditions. Placenta previa involves the placenta being implanted in the lower uterine segment, covering the cervix, which can cause bleeding during pregnancy but does not involve separation. Placenta accreta occurs when the placenta adheres too deeply into the uterine wall, and infarcted placenta refers to areas of necrosis within the placenta due to inadequate blood supply. Each of these conditions has distinct characteristics and clinical implications that differentiate them from abruptio placenta.