4 doctors weighed in:
Is there any way that you can tell if you are pregnant within the first 3 weeks?
4 doctors weighed in

Dr. Carolyn Thompson
Obstetrics & Gynecology
3 doctors agree
In brief: Blood test
A serum HCG is the blood pregnancy test that measures levels of hormone produced by the implanted fertilized egg.
A blood pregnancy test will be positive within 24-48 hours after implantation.

In brief: Blood test
A serum HCG is the blood pregnancy test that measures levels of hormone produced by the implanted fertilized egg.
A blood pregnancy test will be positive within 24-48 hours after implantation.
Dr. Carolyn Thompson
Dr. Carolyn Thompson
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