3 weeks after sex: A urine pregnancy test, done correctly, gives a reliable result 3 weeks after sex (3 weeks after when conception might have occurred), or 1 week after missing a period. If done sooner, a positive result is likely real, but a negative result may be due to testing too soon, and thus lead to a repeat test. If negative at 3 weeks after sex, and still worried, one can repeat one test 1 week later.
Answered 4/11/2015
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A doctor has provided 1 answer
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