I suffered from infertility but for far different reasons. My suggestion would be, have him tested now, or soon. It's simple and inexpensive. My our GYN can do it. This way you might have an idea of what you might be dealing with. You are a wonderful person to love him. My son, who is the one who had UC and is so afraid to even think of talking to a girl, let alone date. He is 24 almost 25. I hope he will find someone like you to love and care for him!