correlated to the development of the fetal anatomy and physiology with advancing gestation it was expected that afp in very early amniotic fluid mainly would be of the yolk sac type , but that a decrease in the non-reactive fraction could be expected by means of an elimination of the yolk sac afp through the fetal gut and a partial replacement by fetal liver afp ( from the fetal liver ) through fetal urine .
C1517162
fetal liver
C0015965
fetal