Alysia,
If your boyfriend is well controlled with his CAH by taking his medication daily and seeing his doctor for regular checks he should have no trouble with fertility. Male infertility in CAH occurs largely because of 'adrenal rest tissue' growing in the scrotum/testicles - due to poor control of their disorder.
Providing you are not a CAH carrier yourself, all your children will be carriers of CAH but would not have CAH.
If you are a carrier yourself each separate pregnancy has 50% chance that your child would have CAH and if that baby did not have the condition then 100% chance they would be carriers. This is the chance that each pregnancy presents - it's not necessarily equally divided down the middle. So for instance if you had four children it doesn't mean that you would definitely have two with CAH and two carriers - you could have one with CAH or three and whichever child doesn't have the full-blown condition would be a carrier.
If you live in Victoria you could phone the GSNV ( Genetic Support Network of Victoria) at the Royal Children's Hospital Melbourne and ask them if you could make an appointment to discuss these things and possibly get DNA tests done. Their phone number is: (03) 8341 6315. Should you live in another state the GSNV I'm sure would be able to direct you to the equivalent service in your capital city.
