Fetal Circulatory Routes Fetal circulation is the circulatory system of a fetus. This is also connected to the mother’s circulatory system. The mother’s body will do all the work that baby’s lungs will do once it is born. This circulation includes the umbilical cord and the blood vessels that are within the mother’s placenta. This carries the fetal blood. When the blood travels through the placenta it will pick up oxygen and become red. The blood will first go through the placenta, by then picking up oxygen before it returns it to the fetus. It will then return to the fetus through the umbilical vein. After this, the blood will then pass through the fetal liver and enters the right side of the heart. The fetal has two extra connections
