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Alpha-fetoprotein (AFP, α-fetoprotein; also sometimes called alpha-1-fetoprotein, alpha-fetoglobulin, or alpha fetal protein) is a protein [5] [6] that in humans is encoded by the AFP gene. [ 7 ] [ 8 ] The AFP gene is located on the q arm of chromosome 4 (4q13.3). [ 9 ]
Alpha globulins are round transport proteins that have a wide variety of functions. Human AFP is produced in the liver, yolk sac, and GI tract of a fetus and dispersed into plasma. The mother of the fetus also obtains AFP directly from the fetus. [8] AFP was first found in human fetal serum in 1965 and determined to be the fetal version of albumin.
First trimester [68] Less invasive Maternal serum screening Including β-hCG, PAPP-A, alpha fetoprotein, inhibin-A. First or second trimester More invasive Chorionic villus sampling: Involves getting a sample of the chorionic villus and testing it. This can be done earlier than amniocentesis, but may have a higher risk of miscarriage, estimated ...
In the first trimester, a standard ultrasound examination typically includes: [12] Gestational sac size, location, and number; Identification of the embryo and/or yolk sac; Measurement of fetal length (known as the crown-rump length) Fetal number, including number of amnionic sacs and chorionic sacs for multiple gestations; Embryonic/fetal ...
The triple test, also called triple screen, the Kettering test or the Bart's test, is an investigation performed during pregnancy in the second trimester to classify a patient as either high-risk or low-risk for chromosomal abnormalities (and neural tube defects). The term "multiple-marker screening test" is sometimes used instead.
A clinical study of lectin-reactive alpha-fetoprotein as an early indicator of hepatocellular carcinoma in the follow-up of cirrhotic patients. Shiraki, K., Hepatology, 22, 802–807, 1985. A clinical study of lectin-reactive alpha-fetoprotein as an early indicator of hepatocellular carcinoma in the follow-up of cirrhotic patients.
Elevated alpha-fetoprotein refers to a state where alpha-fetoprotein levels are outside of the reference range. There are two categories of AFP tests: tests performed on serum (blood plasma), and tests performed on amniotic fluid. Tests performed on serum are further categorized by the reason for performing the test: maternal serum, adult tumor ...
Placental alpha microglobulin-1 (PAMG-1) is a human protein that was first isolated in 1975 from amniotic fluid.PAMG-1 is an important biomarker for the detection of premature rupture of fetal membrane (PROM) The high concentration of PAMG-1 in amniotic fluid means it can be used to detect if this fluid is present in the cervico-vaginal discharge of pregnant women; the presence of PAMG-1 in ...