Alpha-fetoprotein

Alpha-fetoprotein (AFP) is the main protein of fetal serum. It is usually undetectable after birth. Alpha-fetoprotein is produced by the liver and the yolk sac of the fetus, crosses the placenta, enters the amniotic fluid and can also be detected into the maternal blood. It's the main protein during the first three months of development. AFP greatly decreases by age 1 and should only be found  in very low levels in non-pregnant adults.

Alpha-fetoprotein

Alpha-fetoprotein is a protein normally produced by a fetus. Alpha-fetoprotein levels are usually undetectable in the blood of healthy adult men or women (who are not pregnant). An elevated level of alpha-fetoprotein suggests the presence of either a primary liver cancer or germ cell tumor. Also called AFP.
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