Definition: Fetal proteins found in small amounts in adults in the following forms: a-fetoproteins (AFP) increases in maternal blood during pregnancy and, when detected by amniocentesis, is an important indicator of open neural tube defects and is also used as a tumor marker in adults (see following definition); ß-fetoproteins, although a fetal liver protein, has been detected in adult patients with liver disease; ?-fetoproteins occurs in various neoplasms.
See Also: fetoglobulins
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