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Aurora, CO
A 37-year-old female asked:

urine pregnancy test positive one week with blood hcg of 1 and the next week urine pregnancy test negative?

2 doctor answers3 doctors weighed in
Dr. Jennifer Giltnane
Pathology 13 years experience
Not pregnant: A positive urine pregnancy test usually means elevated bhcg, however your blood result does not support a diagnosis of pregnancy.
Dr. Gurmukh Singh
Pathology 49 years experience
Agree with Dr. G: Conception occurs within day or so of the sex. It takes about 3 weeks for the embryo to make enough HCG for a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative repeat the test in 4-5 days. Use first morning urine and follow instructions for the test carefully.

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Last updated Jan 26, 2020

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