I was a little confused about the poll and which question it was asking. Those tests in the pic aren't positive but keep testing once a day (best time is in the afternoon). I usually start testing on CD 8 to make sure I don't miss ovulation and I test until the test line is as dark as the control line (if not darker). This varies from person to person and how long their cycle is. Regardless of length of cycle, however, women typically ovulate about 14 days before their period. If you're super regular and you know when your period will be just count back 14 days and that's the estimated day you'll ovulate. Start testing with OPKs about 5-8 days before just to make sure you catch the surge! Good luck!