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How early can a blood test detect pregnancy? Please answer only if you know the definitive answer. Obgyns?
2 doctors weighed in

Dr. Joseph Woods
Pathology
In brief: Date of conception.
A quantitative blood test can tell approximately the date it was conceived.
The beta subunit of HCG or human Chorionic Gonadotropin can be detected in urine or blood after implantation or 6-12 days after fertilization. The test which can give the quickest result is a rosette inhibition assay for early pregnancy factor (epf) which can tell within 48 hours of fertilization, but it is expensive.

In brief: Date of conception.
A quantitative blood test can tell approximately the date it was conceived.
The beta subunit of HCG or human Chorionic Gonadotropin can be detected in urine or blood after implantation or 6-12 days after fertilization. The test which can give the quickest result is a rosette inhibition assay for early pregnancy factor (epf) which can tell within 48 hours of fertilization, but it is expensive.
Dr. Joseph Woods
Dr. Joseph Woods
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Dr. Yash Khanna
Family Medicine
In brief: Blood pregnancy test
As early as 7 days after the conception.

In brief: Blood pregnancy test
As early as 7 days after the conception.
Dr. Yash Khanna
Dr. Yash Khanna
Thank
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