Most doctors recommend waiting 14 days after ovulation before taking a pregnancy test. If you track your cycles, and you know the length of your luteal phases (you can check it at OvuFriend in Cycles Reviewer), you may take the pregnancy test after having waited for the length of the longest of your luteal phases. Make sure to also take a look at the Pregnancy Sign Detector, which will inform you of the best time for you to test.