I've got to assume that mutants in the Marvel universe would have started up their own sperm banks and stuff at some point. Right? In the real world, blood banks still seem reluctant to accept gay blood. Oh. I'm sorry. That should be "blood that had had sex with a man in the last two years". Or whatever nonsense equivocation current regulations use.
But yeah. I'd think that mutant genetic material would be a harder sell. But I'm sure that there are many mutants who can see the value their genes would have for the overall health of their species despite their unwillingness to actually have kids. Especially because the more powerful ones have a higher tendency to get drawn into situations that would raise their life insurance premiums.
And that's not even mentioning the hordes of base humans who'd be lining up to carry genetically gifted babies. It'd be a brisk business. Doctor Nemesis probably runs it in his spare time. Maybe with Cecilia Reyes's eyes over his shoulder.
Find me a dude who makes surgical gloves look more epic.