Talk:Zahard/@comment-27973430-20170227154119/@comment-26484417-20170227161831

I think you pretty much answered yourself. If it were the latter, then there would be no reason to believe that Princesses can help, which strongly suggests that it's the former.

As for particularities, the fantasy bookshelf suggests that it's either what EternET mentioned, or that his blood is so strong / pure / something that weaker females cannot even get pregnant in the first place. Seeing as other male GWs have families all over the Tower--and the wives haven't been exactly suggested to be chosen for their power--it's unlikely that there is a problem with conception, so the problem should be with carrying the child to term. In other words, it should be what EternET mentioned, or at least some variation thereof.