Pretty accurate but not 100%
Answered 8/15/2022
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Conception occurs within day or so of the sex. It takes about 3 weeks for the embryo to make enough HCG for a positive pregnancy test. Blood test may be done a day after a missed period. Home pregnancy tests should be done 4-5 days after the missed period. If the result is negative repeat the test in 4-5 days. Use first morning urine and follow instructions for the test carefully.
Answered 8/19/2022
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The accuracy of a positive test is almost 100%, so if someone has 2 positive tests spaced 12-24 hours apart, its almost 100% certain that the individual is pregnant. A negative test is slightly less accurate, as it depends on when the sample was collected in relation to time of day and most recent menstrual cycle.
Answered 8/19/2022
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