We have a known male factor issue and I've just turned 43. We talked to SGF, Dominion, Cornell and an RE out in CA about the IVF cycles. Seems like whoever you talk to is likely to have their "go to" treatment that has worked for others, but there's still no guarantee it'll work for you. I think the docs at each clinic are very good, but it's definitely a frustrating process when you don't fit into the perfect patient box or if you have complex issues. However, I also was happy I got the additional input. Usually, you can do a 1 hour consult that runs about $600-700, even if you don't intend to go to that RE.
If you suspect male factor issues, SGF's urologist, Dr. Shin, is great. We've also consulted with a urologist at Cornell who seemed more willing to try some other things. A urologist should be able to give you some clear info on whether there is a male factor at play. Even if the #s are good on the SA, they can do fragmentation tests that can give some info about quality.
I will say that I saw an improvement in the number of eggs I got after taking supplements (Vit D, ubiquinol, fish oil). I also decided to do a mini stim cycle using low doses of stims to see if that would improve quality. I got essentially the same # of eggs that cycle as I did on max stims, but our fertilization rate was much higher (77% instead of 50% or less as was the case in all 5 prior cycles). I also did start taking DHEA a few months ago, which some think will improve egg quality and/or #s for people with DOR. There are also people who think DHEA is a bad idea, so I'm not necessarily recommending it. AND, I made my hubby take supplements, too.
Some people will also swear by REs that check immune issues, but I don't know much about that. There are lots of threads on here, though.
I hope you get some answers!