There is a neat package from fertell that is for COUPLES! I don't know how well the female test works. It is a test that simply tests 2 of the most common reasons for women to not conceive. It checks FSH which can be a problem, and THAT won't occur unless you are SOMEWHAT healthy and have the proper hormone balance, another popular problem.
MOST male tests work EXACTLY like the female test, which doesn't really prove much. SOME stain the sperm, which proves little else. The FERTELL test claims to do what would be almost the ULTIMATE in proof! It actually claims to act like a vagina, and causes the sperm to be stained and attracted to a target. If you see the stain, it means enough sperm made it! That tests that there are enough, and they can swim. That means they are probably fertile, etc....
Anyway, I bring that up because you and your boyfriend might want to make sure you both have a good chance, etc.... It costs like $60-$70 for BOTH of you together, which is cheaper than one of you going to the doctor. If YOU have a problem, you could take fertility drugs. If HE has a problem, he can try to stay cooler, take vitamins, or maybe eurocoma, depending on what his problem is.