1 doctor weighed in:

On CD21 is it to soon to get a positive beta hCG blood test? I recieved a negative result on CD21. Do i still have a chance of being pregnant?

1 doctor weighed in
Dr. Robert Kwok
Pediatrics

In brief: Patience

Patience. A pregnancy test done correctly should give a reliable result 3 weeks after sex or 1 week after missing a period.
Done too soon, a negative pregnancy test might be a false negative. Generally, there is no need to test too soon. Also, a woman is not pregnant if she gets her normal, regular period; meaning she should not need a pregnancy test unless she misses her usual, regular period.

In brief: Patience

Patience. A pregnancy test done correctly should give a reliable result 3 weeks after sex or 1 week after missing a period.
Done too soon, a negative pregnancy test might be a false negative. Generally, there is no need to test too soon. Also, a woman is not pregnant if she gets her normal, regular period; meaning she should not need a pregnancy test unless she misses her usual, regular period.
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