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A member asked:
Can i fully trust a negative pregnancy test 40 days after a sexual activity? and is it really reliable 40 days after sexual activities?
A doctor has provided 1 answer
Tests are accurate: Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, vaginal spotting, or medications. A test gives a reliable result 3 weeks after sex (3 weeks after when conception might have happened) or 1 week after missing a period. If done sooner, a negative result may be due to testing too early such as less than 2 weeks after conception.
Answered 3/5/2018
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