A member asked:

Test 7-9 dpo then lite bleed same day. blood test - & ultrasound show no pregnancy w/ thin uterine lining 3 days later. false + or was it 2 early??

A doctor has provided 1 answer

Too early: 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 re do the test in 4-5 days, unless you get a period before then. Use first morning urine and follow instructions for the test carefully.

Answered 6/6/2015

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