Does anyone else have a boyfriend who is 28 or older with no children and afraid they cannot conceive?

My boyfriend is going to be 28 on Saturday. He doesn't have any children and I have a daughter from a previous relationship that is 6. We both want to have a baby and he is scared that he cannot have any since he hasn't had any yet (has never tried but has had a few slips). We have been trying for 2 months 1/2 months and this is my 3rd cycle , fingers crossed this is the time. Any suggestions?