When should opk be positive?

[mumofone1992]

Im supposed to ovulate Sunday, been testing wirh opk since yesterday (4 times) all negative. When should it be going positive? Thanks

 

[Clo]

It varies from individual to individual. The your luteal phase (the days between ovulation and AF usually stays the same every month) but the length of time before that can vary. On average you would ovulate 14 days before AF but not everyone is the same. My LP is 11 days and my cycle is often 27 days (but can vary between 23-27 days). On a 27 day cycle I usually get a positive OPK on day 14 or 15. x