Advice - friend who may be infertile

My friend who is in her early 20’s told me that she isn’t very fertile. I think she had some tests done and recently found out she has low percentage of conceiving. She isn’t trying to plan a family right now but since we are at the age where everyone asks when we will it came up during a conversation.

I wanted to know from people who have experienced fertility issues and maybe found out before they were even trying to have a family what is the best way to support a friend during this time. What are things that you can possibly say to show your love. I don’t want to automatically go to the “I’m sure that you will have kids, we have the medicine route” or say anything that can be insensitive. I would really love to hear how I can show my love and support to my friend in the best way possible. Thanks ahead of time.