<P> A pregnancy test attempts to determine whether or not a woman is pregnant . Indicative markers are found in blood and urine , and pregnancy tests require sampling one of these substances . The first of these markers to be discovered , human chorionic gonadotropin ( hCG ) , was discovered in 1930 to be produced by the syncytiotrophoblast cells of the fertilised ova ( eggs ) . While hCG is a reliable marker of pregnancy , it can not be detected until after implantation ; this results in false negatives if the test is performed during the very early stages of pregnancy . HCG can be detected via blood 8 days after fertilization of the egg , and in the urine 10 days after . </P>
<P> A pregnancy test attempts to determine whether or not a woman is pregnant . Indicative markers are found in blood and urine , and pregnancy tests require sampling one of these substances . The first of these markers to be discovered , human chorionic gonadotropin ( hCG ) , was discovered in 1930 to be produced by the syncytiotrophoblast cells of the fertilised ova ( eggs ) . While hCG is a reliable marker of pregnancy , it can not be detected until after implantation ; this results in false negatives if the test is performed during the very early stages of pregnancy . HCG can be detected via blood 8 days after fertilization of the egg , and in the urine 10 days after . </P>
when can hcg be detected in urine test
when can hcg be detected in urine test
via blood 8 days after fertilization of the egg , and in the urine 10 days after .
via blood 8 days after fertilization of the egg , and in the urine 10 days after .