Quote Originally Posted by Buffalobiian
I think it was stated that Youma could not reproduce. I don't recall anything about Claymores since they tend not to live long enough to find out. Their bodies are also supposed to be disgusting.
Yes their bodies are supposed to be disgusting, we had that info in the young Claire arc.
We can suppose that the butchery the organisation performs on the girls render them inept for reproduction. If not the view seems to be enough to repell even the less subtle brute raper there is.

I suppose the butchery is performed before puberty, to exclude any sex related awakening, if so, it's possible to extrapolate that the youma flesh inside them totally messes with their hormonal system. I also wonder if it doesn't make them grow faster.

And yes, their lifespan is short and pregnancy would probably shorten it even more, having them killed before giving birth. Afterall, pregnancy is not compatible with physical combat.