ICSI telling your manager

Hi ladies, so I’m due to start ICSI with <a href="https://glowing.com/glow-fertility-program">IVF</a> soon but I don’t know how to tell my manager/what to say? Because obviously she needs to know for the time off I will need for different scans etc. I’m worried she will judge me for only being in my 20’s and be a bit funny. Please help? TIA X