My vote would be yes,
While as most already stated and as would be expected, child avatars wouldn't be the case - being able to thoughtfully comprise, draft, and role-play through a child's birth and life completely upon story board is a good way to create connection between characters(parents).
In my story line, I did start from a young age and begin explaining my encounters, expectations, drives and how they shift at different ages.
If your in role-play for reasons revolving around developing manuscript or story based off what your role-playing then I would say it is near inevitable that a pregnancy or child would come of at some point, in some way or form.
Even Tarl found himself amongst them:
"Here and there children ran between the wheels, playing with a cork ball and quiva, the object of the game being to strike the thrown ball. "
Nomads of Gor Book 4 Page 27
"A woman carrying a market basket moved to one side, watching him, that she might not touch him, holding a child to her."
Assassin of Gor Book 5 Page 7
My conclusion would be that while children should be expected as part of a detailed story-line at no point would I expect to see one pass me in character. As I live in a southern city, most references describe children as being near-stocked away or highly protected. The only case under which I see children "frolicking" in public would be within' Nomads several times as of course the caravans wouldn't provide much place for sheltering/hiding children.