Once you have your first kid, you can expect 3 more, 2 years apart... Don't know if you can have more, as I haven't made it too far into a game beyond having the 4th kid.
Would be nice to mix that up a bit, maybe the champs could pick up some random traits in the game, like the one you just married is sterile, only you wouldn't know that. It could change from game to game, she's sterile in one, prone to having twins in the other, good for only 1 kid, etc....
