It could take a few months or up to a year. Just depend on your body.
I was on it for 18 months. And it took me four months after my missed shot to get get a period. Which was yesterday. So I'm hoping I can now ovulate since a period is a sign that ovulation had occurred and I just didn't get pregnant when it did. I didnt do anything special to bring it on. Unfortunately I just waited and waited until it came. Good luck to you and baby dust!