Why do you have to take a break with cysts?

I’m seeing that many people doing <a href="https://glowing.com/glow-fertility-program">IVF</a>, clomid, femara have to take a month off from TTC if they have an ovarian cyst. Why is that?

My obgyn has never done ultrasound for me and I’ve been on femara awhile, I might have a cyst (based on pain) but since no ultrasounds, I don’t know and kept taking femara a couple cycles after I had the thought it might be cyst.