i am 30, DH is almost 45 - we TTC for over 3 years before having success late 2008 and meeting our princess last year

DH had MANY semen analyses due to fertility issues i have and the treatment we required - his swimmers (volume, motility, morphology) were never a drama. general lifestyle factors CAN impact things - so it's a good idea to live healthy (no smoking, cut back on alcohol if he's a drinker etc) - if you've been TTC a while, it's worth getting both of you checked out

we had a "stop" point in mind - we would TTC until DH turned 45 - yes, he isn't as prone to the biological clock thing, BUT, he was born to an older father and lost his dad young (mid teens) so he wanted to stop at that point "just in case". having said that, he is 45 next week, adn we haven't (and won't) take any precautions to prevent a pregnancy just because he is older.

i guess, given his age, talking to a GP about getting an SA done just to see where you're at may be a good idea