What is an Alpha-Fetoprotein Screening?
*is obtained by a blood sample from the mother
*alpha-fetoprotein is a glucoprotein produced by fetal yolk sac, GI tract, and liver
*it can be done on mother's blood b/t 16-20weeks gestation
*this protein passes through the placenta to the maternal circulation and is excreted through fetal circulation and into the mother's circulation
*if abnormal levels, amniocentesis should be done