Q:

What are normal lab ranges for AFP tests?

A:

Quick Answer

Normal alpha-fetoprotein test results are less than 40 micrograms per liter of blood in men and non-pregnant women, according to Healthline and WebMD. Expectant mothers typically take the test between the 14th and 22nd weeks of pregnancy to help screen for birth defects.

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Full Answer

Significantly higher AFP levels may indicate a neural tube defect in the developing baby, or they could be due to an inaccurate dating of the pregnancy. Unusually low levels could indicate a chromosomal abnormality in the fetus, such as Down or Edwards syndrome, explains Healthline. Abnormally high results among men and non-pregnant women may indicate the presence of certain cancers or liver diseases.

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