Hi Becky,
Our sperm donor has type 2 diabetes, although a bit younger (30) and I got pregnant on my third try of home insemination, really it was the first time we had the ovulation right.
Previously we had fertility treatment (ivf) and home insemination with sperm donors from a sperm clinic that were supposed to be all healthy and top quality sperm but didn’t get pregnant.
Type 2 diabetes can have some effects on sperm quality to some extent but it depends on a case to case basis.
If you’re worried you can do some basic sperm analysis but even that might not tell you much.
Our sperm donor took some vitamins for improving quality and was trying to be healthier.
We never tested his sperm but obvs, it did the job.