How soon after conception can uterine changes be felt via pelvic exam & how early after conception can a pregnancy test show positive results?

10 days. A blood pregnancy test is the most accurate type of pregnancy test. It can detect a pregnancy as early as 10 days after conception. A urine pregnancy test is reliable after you miss a period. Uterine changes take longer and depending on who is doing he exam may be felt at 10-12 weeks after conception. Best wishes!