How to tell family member who struggles with infertility

Hey guys! I just found out I’m pregnant with baby #4. We have three boys in fingers crossed for a girl! We are so excited but a very close family member is struggling with infertility. They have one child, and have tried ivf for a second with no success. I’m stressed about telling them bc I don’t want to hurt them and feel like I’m running it in their face. Has anyone gone through similar and can give any advice?