Hey there! I've definitely heard that sperm builds up the longer a man goes without ejaculating, but I'm not sure if it would necessarily increase the odds of conception if he's got a low sperm count.
Not to overshadow your question, but just out of curiosity, how do you go about getting a semen analysis done? Can your primary care physician do it? I'd like my fiance to have one before we officially TTC.

Thanks so much!
As far as your situation goes, I think you should go ahead and BD since he's likely got a whole batch saved up for ya! Good luck!