1-2 days before: generally the earliest you should test is 1-2 days before the expected period. If you have a certain ovulation date you can count about 11 days from that. There may still be false pos/false negs if you test this early, but it's mostly reliable. If your cycles are irregular you may need to wait longer.
Answered 2/11/2015
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A doctor has provided 1 answer
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