According to the Internet, lol, it's better to do ovulation testing in the afternoon or evening because the burst of hormone occurs sometime in the morning. The window that it can show up on the testing is relatively short also and could be missed, meaning you could be ovulating but not test at the right time and therefore not know because it could show as being negative? Also better not to drink a crap ton of water therefore diluting down the urine.  Seems reasonable. Thoughts?