Pregnancy unlikely: Home pregnancy tests are very accurate and not affected by foods, herbs, common illnesses, sexually transmitted diseases, or medications. A correctly done urine 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 than 2 weeks after recent sex, a negative result may be due to testing too soon.)
Answered 5/7/2015
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