1. The Fetal Blood flow starts with the placenta. after it passes the placenta it then goes to the liver and the liver cleans the blood for toxins. the blood is passed in the heart by a hole that the fetus has before birth then after birth it is suppose to close and become an septum primum causing the foramen ovale to close because of the pressure in the left atrium. it takes two to three days for it to close completely and is know as the ligamentum arteriosum.
I have not experience it to remember what happened when I was an infant. I can only say that I have heard about it from others.
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