How long after spotting, will i get a positive home pregnancy test?

Spotting not a sign.: Home pregnancy tests can show positive as early as 3-4 days after implantation. Implantation generally occurs 6-12 days after ovulation. So if the egg was fertilized right at ovulation and you used the most sensitive home test it could be positive at 9 days. On average it is 13-14 days after fertilization/ovulation when it is positive. We recommend testing 4-5 days after a missed period.