Helping a friend

Theresa • I`m a mother of a beautiful 1 year old little boy. I`m happily married :3 to my high school sweetheart♡(:!
Hello ladies I'm trying to help my friend out her and her husband been trying to have babies for a few years now she wants to have a baby so bad and it breaks my heart she is so kind hearted to my little man and they would be wonderful parents what is she doing wrong last time they got pregnant they had a miscarriage what could they do to possibly help them out?