My son has diabetes, ( type 1) and he has 2 children. So far the children have not shown signs of diabetes. The likelihood of inheriting diabetes, as far as my research has gone, seems to be about one in twenty - that's a five-per-cent chance. If your H has type 2, the likelihood depends very much on lifestyle, rather than inheritance. So I can't help feeling that he has an ulterior motive somewhere. After all, you could get pregnant by a donor if he is so determined not to become a biological father himself. But I fear there is more to his obstinacy than meets the eye. Maybe he is trying to get you to leave him - say, if he wants a divorce but doesn't want to be the one who starts it. Does he bully you in other ways too ? You might find a kinder man somewhere else.