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A member asked:
How do doctors know that hcg isn't detected in pregnancy tests (urine/blood) until implantation?
3 doctors weighed in across 2 answers
Before implantation: There is no vascular supply to the fertilized egg. As a result, the HCG cannot be detected in the mother's blood work and urine.
Answered 6/10/2014
5.3k views
Prior studies: Many studies have been performed to determine when the HCG begins to be produced and when it would reach a detectable level. Those studies tell us that it takes about 7 to 10 days for a urine pregnancy test to become positive. A blood test would be positive days sooner - and at much lower levels.
Answered 10/4/2016
5.3k views
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People also searched for:
Is a doctors urine blood test the same as a home pregnacy test or will it measure specifically the amount of hCG rather than just its presence?
My last m.Cycle was sept24. Went to doc on nov 12 did urine n blood test both neg. Still no period, n took hpt on fri n also neg. My hCG was 2.?
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