Does the placenta bleed during production?

Patient's question:

No

Doctor's answer:

Hello, it is generally not the case. The main clinical symptoms of placenta previa are recurrent painless vaginal bleeding in the second and third trimesters of pregnancy. This is because as the gestational weeks increase, the uterus continuously expands, the lower segment of the uterus extends, and the placenta becomes misaligned with the uterine wall. In other words, the placenta detaches from the site of implantation, leading to vaginal bleeding. Generally, the first episode of bleeding is relatively light, and the amount of bleeding tends to increase with subsequent episodes.