These are very impressive gains— congratulations!

I've read that a few members on this forum followed a similar path: they used Evenity first, then transitioned to Prolia for 2-3 injections in hopes of achieving further BMD gains. Based on their posts, they're planning to switch to Reclast after completing the Prolia doses.

Your endocrinologist makes a valid point about taking a one-year "sabbatical" from Evenity. I believe it was during last year's Santa Fe Bone Symposium that several specialists mentioned the idea that "bone doesn't want to keep building" indefinitely.

There is a clinical study (small) that looked at a sequence of Evenity → 2 Prolia injections (1 year) → Evenity. BMD outcome is shown in the graph below. The full publication link:
https://pmc.ncbi.nlm.nih.gov/articles/PMC6877701/
Keep in mind, though, that this study used a shorter duration of Prolia than what your endocrinologist is proposing. As many of us now know, the risk of rebound bone loss increases with more doses of Prolia. If you end up having four injections, will Evenity's antiresorptive effect be strong enough to counteract a potential rebound? That's definitely something worth discussing with your endocrinologist.

Are you able to take a bisphosphonate orally?