Is it true that the fetus shares a direct blood supply with the mother during pregnancy?

During pregnancy, the fetus does not share a direct blood supply with the mother. The circulatory systems of the mother and fetus are separate, allowing for the exchange of nutrients and waste products without direct mixing of blood.

The placenta plays a crucial role in this process; it is the organ through which maternal and fetal blood circulate in close proximity, facilitating the transfer of oxygen, nutrients, and antibodies while also removing carbon dioxide and metabolic waste from the fetal circulation.

In this way, while the fetus relies on the mother for essential substances, there is no direct blood supply connection, ensuring that each maintains its own distinct blood composition and pressure, which is vital for the health of both the mother and the developing fetus.