What age is the cutoff for iui?

Hi, just wondering if 37 would be too old for <a href="https://glowing.com/glow-fertility-program">iui</a>? Just want to get a rough idea of if most clinics allow this or not. I'm hoping to do <a href="https://glowing.com/glow-fertility-program">iui</a> with a donor as a previous pregnancy had genetic issues and donors are screened for things like that. Also if anyone can share some insight into doing fertility treatments as a single person that's would be fab 🖤