Are you guys having sex at the right time. There is a lot of factors that you can look into. They also have stuff in the drug store that lets you know if you or him is infertile. Also you can check with your doctor and have them run a few test. Sometimes it's a process that you go through. for me I saw that his sperm was always leaking out after sex even after we had sex hours ago. I tried an at home remedy and it worked. I was pregnant that next time I ovulated.
What was the remedy that's my problem