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A member asked:
How many days after sex can u take a pregnancy test and be reliable?
A doctor has provided 1 answer
15-20 days: 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.
Answered 1/21/2015
3.3k views
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