Beastman to Beastman (Argonrian on Khajit) has no recorded offspring, Men (Nords, Imprerials and Redguards) on Mer (Altmer, Dunmer, Bosmer, Orchsirmer (orcs)) have produced offsrping albiet with the above mentioned occurrences. Beastman on Men/Mer also have no cases of offspring.
Incorrect.
Elf women are promiscuous when they're young. You'll outgrow it. Perhaps you're beginning to already," Katisha said hopefully. "You ought to meet some nice elven boys, though. If you keep on keeping company with Khajiits and humans you'll find yourself pregnant soon."
Barenziah smiled involuntarily at the thought. "I'd like that. But it would be inconvenient, wouldn't it? Babies are a lot of trouble, and I don't even have a home yet."
"How old are you? Seventeen? Well, you've a year or two yet before you'll be fertile, unless you're very unlucky. Elves don't have children readily with other elves even after that, so you'll be all right if you stick with them."