A Station Eight Fan Web Site
You said that one of the reasons that Princess Katherine and Tom the Guardian didn't have any children is because there weren't very many fertility specialists on Avalon. Therefore either Princess Katherine or Tom were incapable of having children.
I always thought that with having to take care of 36 gargoyles and gargoyle beasts, who aged at half their rate, they would have had their hands full.
Anyway, even though I thought that having 36 hatchlings was better than having 36 hatchlings and 1-? kids, I'm just wondering, who had the problem Katherine or Tom?
Of course, they did have their hands full, but I have to say I doubt they were using (or wanted to use) birth control. So the lack of biological children was most likely the result of one or both of them having a medical issue.