I am on day 11 tomorrow and still no sign of ovulation, can it be later than 12 days before ovulation?

Hello ma'am, do you mean ovulation or menstruation?

Thanks for the feedback. Ovulation usually occurs 10 to 14 days before the next period. For example, this means between days 14 and 18 for a person with a 28-day cycle.

To try to find the time of ovulation, it is therefore necessary at some point to know the usual length of your cycle.