Not about timing: The Clearblue packaging or website should provide you with the numbers: "over 99% accurate from day period is due." That number is not broken down to sensitivity & specificity, though. Elsewhere reports 1/2% false positive rate. Regarding the blood test, it depends on the brand as well. Blood tests are more sensitive than urine tests; they can pick up lower levels of hCG soon after *implantation.*
Answered 11/24/2014
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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