I've stopped Cerazette when will I ovulate?

14 days before. An easy way to remember ovulation is that it occurs 14 days before your next cycle. If you know how many days between periods then you can calculate an approximate ovulation date.
Cerazette. It is hard to say, but generally speaking you may ovulate as late as 3 months after stopping or as early as one month. Now, with this pill, one has to be very reliable in taking this medication or there is a high possibility of pregnancy. That being said, you may ovulate earlier than if you were only combination oral contraceptives.