Relaxedlevis, thank you very much. My Dh has been on every known vitamin and antioxidant and Chinese herbs etc etc you name it for several years. the reason why genetic testing has been suggested is because none of that made any substantial difference. Having said that vitamins/lifestyle is the first thing to try to improve and if it works you will see the results in a few months. if it does not unfortunately you need to move on and investigate further.
btw, our urologist recommended to limit any exercise to 30 min and not more as it increases body temperature and kills sperm. Also BD every day around O (rather than every other day)! I know this goes against everything I read so far but I totally trust our urologist, he is considered the best in the UK and he said it will improve the quality.
if it's helpful here's my DH's list of supps:
Wellman Conception
Vitamin B complex
1,000 Maca
1,000 Ginseng
200 COQ10
60 Pycnogenol
1,000 Flaxseed oils
1,000 Fish oils
1,000 L-Arginine
1,000 Carnitine
700 Horny Goat weed
500 tribilus
60 Zinc
50 Selenium
800 Calcium
1,000 Vitamin C
1,000 Vitamin B12
800 Vitamin E
4,000 Vitamin D