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A member asked:
Can i get a negative pregnancy test 3 weeks after unprotected sex ?
2 doctors weighed in across 2 answers
If performed properly a urine pregnancy test is usually positive by 3 weeks after exposure. They are more likely false negative than false positive. Using a first morning urine is often the best sample to give a true result. Re=test if desired.
Answered 4/20/2022
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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.
Answered 4/20/2022
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