About 10 to 14 days: A blood betaHCG pregnancy test will usually detect an early pregnancy 10 days after fertilization or about 10 days after unprotected sexual vaginal sexual intercourse with a fertile man during the fertile ovulatory period . Most urine pregnancy tests, depending on the brand and the concentration of your urine, will be reasonably accurate about 14 days "after having unprotected sex" at ovulation
Answered 5/1/2016
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