A member asked:

Late pd. as of today late 1 day. trying to get pregnant. took 2 test before today. negative pregnancy test. is this a concern?

A doctor has provided 1 answer

Tested too soon: Conception, as defined by the generation of a fertilized ovum, occurs within day or so of the sex. However, it takes about two weeks for the embryo to make enough HCG to produce 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 6/23/2015

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