Sterile Morphs

[Ohlacey]

I've heard a lot about some morphs, such as Desert, that can result in sterility, but I can't really find a compounded list or a very sturdy source of information on the subject.

Do certain morphs result in sterility? In which morphs is it frequently observed?

[SlitherinSisters]

I believe the desert is the only one that people claim to be sterile, but that has yet to be proven with 100% certainty.