A 22-year-old male asked:
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if someone ovulates and concieves and then a week later takes a pregnancy blood test, how accurate will that be?

1 doctor answer
Dr. Christina Adberg
25 years experience Obstetrics and Gynecology
Not if it's negative: A positive test is pretty accurate, but a negative test is not reliable that early. It can take 11 days after conception to show a positive blood test result. To make it more complicated, since sperm can live for up to 5 days inside a woman, and ovulation is sometimes difficult to pinpoint exactly, she can conceive later than she thought, and need to wait longer for a positive result.
Answered on Apr 6, 2016

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Possibly: Try waiting 1 week then repeating the test. If it's negative, see your doctor.
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