Fetal Maternal Blood Circulation

The maternal and the fetal the supply of blood to the placenta is influenced by various factors especially by the arterial blood pressure uterine contractions tobacco abuse medications and hormones.

Fetal maternal blood circulation. The fetus is connected by the umbilical cord to the placenta. In animals that give live birth the fetal circulation is the circulatory system of a fetus the term usually encompasses the entire fetoplacental circulation which includes the umbilical cord and the blood vessels within the placenta that carry fetal blood. The placental circulation brings into close relationship two circulation systems. Peripheral blood was obtained from normal neonates 1 3 days old adult men and pregnant and non pregnant women.

During pregnancy the fetal circulatory system works differently than after birth. Fetal circulation unlike postnatal circulation involves the umbilical cord and placental blood vessels which carry fetal blood between the fetus and the placenta. The fetal prenatal circulation differs from normal postnatal circulation mainly because the lungs are not in use. The oxygen rich blood then returns to the fetus via the third vessel in the umbilical cord umbilical vein.

Fetal circulation how does the fetal circulatory system work. Direct analysis of fetal cells from maternal circulation has been challenging given the scarcity of fetal cells in maternal blood 1 10 000 1 1 000 000 and the focus has shifted to the analysis of cell free fetal dna which is found at a concentration almost 25 times higher than that available from nucleated blood cells extracted from a similar volume of whole maternal blood. It is usually established in the fetal period of development and is designed to serve prenatal nutritional needs as well as permit the switch to a neonatal circulatory pattern at birth. The oxygen rich blood goes through one of the two extra connections in the fetal heart that will close after the baby is born.