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What Causes An Invalid Pregnancy Test?
A pregnancy test measures a hormone called human chorionic gonadotropin (HCG). HCG is a hormone produced during pregnancy. It appears in the blood and urine of pregnant women as early as 10 days after conception.
See also:
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HCG - urine -
HCG - serum - qualitative -
HCG - serum - quantitative
How the test is performed
A pregnancy test may be performed using blood or urine. There are two types of blood pregnancy tests:
- Qualitative, which measures whet...
More information on "What Causes An Invalid Pregnancy Test?"
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