Last I checked, technically it’s possible to undo vasectomies? Yeah I just googled reverse vasectomies,( that’s why more and more men should be in charge of birth control, pills sucks for women’s tube tying surgeries it’s more likely not to be possible to reverse. )
Oh but there is a slight chance of pregnancy even with vasectomies but like 1 in 10000 or something.
Iirc a vasectomy is where they cut and tie the tubes but if they just tie the tubes maybe it's reversible? Anyways it just prevents sperm from entering the fluid, so technically while it is a pretty "permanent" way of stopping what will make him pregnant, he'll still be full of the cum fluid (minus sperm).
An alpha that did a vasectomy? That’s new
But will it really work tho? With the omega? I don’t know how this things work, but isn’t there a chance that the vasectomy doesn’t work as expected?