Testing

Chanclyn
So my husband and I are ttc #1  yay!! We have been trying for about 3-4 months so far. Now my mom has had 8 children and my dad 2. His mom has had 3 children and he is the only child on his dad side.... In fact his dad wasn't even supposed to be able to have kids.. But his mom got pregnant anyways.. And yes it is his father... DNA doesn't lie lol so my whole thing is this.....is it possible my husband can't have kids because of fathers said history? And should we go get him tested?? How do I approach it to him without questioning his man ego??