Patient's question:
20130601 Pregnant for six and a half months, with a small amount of blood in the vagina, checked for low placentaDoctor's answer:
As the pregnancy progresses, especially in the late stages or near delivery, the lower segment of the uterus gradually extends, the cervical canal disappears, and at the same time, the cervical os widens. However, the placenta does not develop along with the widening of the cervical os, resulting in its detachment from its attachment site. This, along with the rupture of blood vessels, leads to vaginal bleeding.1. Medical History.