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Definition of Alpha-fetoprotein (AFP)

Alpha-fetoprotein (AFP): AFP is a plasma protein that is normally produced by the fetus. It serves as the basis for some valuable tests.

AFP is manufactured principally in the fetus's liver and gastrointestinal (GI) tract besides the yolk sac, a structure temporarily present during embryonic development.

The AFP level is typically high in the fetus's blood. It decreases in the baby's blood after birth. And by one year of age, it is virtually undetectable.

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