Guilt about trying while my best friend is struggling

Hello everybody :) I just have a quick question. My best friend recently revealed to me that her and her husband have been ttc for a year now with no success. She didn’t appear to be TOO upset about it, and even expressed interest in stopping ttc to adopt. Until a few days ago, my husband wasn’t ready to start trying. Finally, we are ready and have already gotten to work. She’s my best friend so I really am dying to share this news with her but I feel somewhat guilty. How would you go about telling this to your best friend if she was experiencing trouble? And I can’t even imagine the guilt I’ll feel when it actually does happen. All honest advice is welcome :)