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How soon after intercourse can a blood test detect pregnancy?

1 doctor weighed in
Dr. Gurmukh Singh
Pathology

In brief: After missed period

Conception, as defined by the generation of a fertilized ovum, occurs within day or so of the sex.
However, it takes about two weeks for the embryo to make enough HCG to produce 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. Use first morning urine and follow instructions for the test carefully.

In brief: After missed period

Conception, as defined by the generation of a fertilized ovum, occurs within day or so of the sex.
However, it takes about two weeks for the embryo to make enough HCG to produce 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. Use first morning urine and follow instructions for the test carefully.
Dr. Gurmukh Singh
Dr. Gurmukh Singh
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