Hi, my 31 year old fiance is on 105mg of methadone a day. He's been on the program for 2 years now and has been on 95-105mg for the past year. He also has watery sperm, even though he doesn't ejaculate often, ED, diabetes (he quite producing insulin at 7), pancreatitis, and has had his gallbladder removed due to stones. The ED alone has made it so we haven't been able to try to conceive at the right time but I'm beginning to wonder if even trying would be futile. Could these factors cause him to be infertile?