What is fetal circulation?

Fetal circulation refers to the unique system of blood flow that occurs in a developing fetus, allowing it to receive oxygen and nutrients from the mother through the placenta. Unlike postnatal circulation, fetal circulation bypasses the lungs and liver, utilizing structures such as the ductus arteriOSus and foramen ovale to redirect blood. The umbilical vein carries oxygen-rich blood from the placenta to the fetus, while the umbilical arteries return deoxygenated blood back to the placenta. This specialized circulation is crucial for supporting the fetus's growth and development before birth.