Why can’t I have sex during IUI cycle??

Mekala

This is our first <a href="https://glowing.com/glow-fertility-program">IUI</a> cycle and our fertility clinic told us that we shouldn’t have unprotected sex until we are instructed to. I’m listening to them and following instructions obviously… but I’m just curious if anyone knows WHY we shouldn’t be having unprotected sex? I can’t find an answer online but I’ll ask my nurse at my next appointment.