More accurate: Both tests search for HCG or human chorionic gonadotropin, the hormone produced by the fetus. A blood pregnancy test will tell you the exact level of the hormone and can be detected at much lower levels, therefore giving an earlier result. A urine pregnancy test is only positive or negative the quantity of HCG in the blood pregnancy test can also help determine how far along the fetus is.
Answered 10/5/2016
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