IUI OR IVF

Em
Can someone explain please what the difference is between <a href="https://glowing.com/glow-fertility-program">IUI</a> & <a href="https://glowing.com/glow-fertility-program">IVF</a>. I've just been told I will need <a href="https://glowing.com/glow-fertility-program">IVF</a> if I want to have a baby but I've seen people talking about <a href="https://glowing.com/glow-fertility-program">IUI</a> aswell ?