Clomid follicle check? Twins?

KD

I am doing Clomid with OPKs for <a href="https://glowing.com/glow-fertility-program">IUI</a>.

I see a lot here getting follicles checked to avoid multiples?. And some even put off <a href="https://glowing.com/glow-fertility-program">IUI</a> due to higher risk. My dr didn’t mention checking, is this normal?