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How many days from conception do you have to be before a home pregnancy test will definitely be accurate?


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Wiki User
2015-07-16 18:22:25
2015-07-16 18:22:25

It takes approximately 36 hours for the sperm to fertilize the egg. That is about 1 day and 1/2. I would say wait at least 1 1/2 or 2 weeks before you take a pregnancy test so the results can come out accurate.

Generally, it takes about 10 to 14 days from the time of conception to accurately detect HCG in the urine. Conception may occur on a certain date however, it can take up to 3 to 4 days for actual implantation to occur. That means that you may have to wait a week to detect hcg at the proper levels.


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no you would need to wait at least a week or two before it will actually show an accurate answer

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Ironically, the Walmart cheapies -- Equate brand. It identified my pregnancy four days before my period was due. (A faint line, but definitely a line.)

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Well it is hard to say without knowing when your are supposed to have your period. The best time to take a pregnancy test is either the day before your expected period or the day of your expected period. According to the ClearBlue pregnancy test accuracy results they are: 4 days before expected period= 51% accurate 3 days before expected period= 82% accurate 2 days before expected period= 90% accurate 1 day before expected period =95% accurate the day of expected period =99% accurate

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Early result pregnancy tests will sometimes show positive 10 days after conception or 5 days before your expected period.

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