What is the effect of the placental blood pool on the fetus? What should be noted?

Patient's question:

No

Doctor's answer:

Hello, the placental blood pool is a larger, near-round dark area in the central part of the placental villi without villi in the placental parenchyma. Fine dense specks can be seen flowing from the side wall into the dark area. If the range is large, it will affect the exchange of villous blood flow.