How far along do you have to be for a positive pregnancy test?

Depending on how sensitive the home pregnancy test is, some claim to detect pregnancy as early as 7-14 days after conception. The test measures the hormone hCG, which is released by the body after conception. For best results, take the test with the first morning urination, or wait several hours since the last time you've urinated. Drinking large amounts of water or frequent urination can create inaccurate results. Good luck!