I asked because I was under the impression that the donating babies to the temple and picking sons and daughters from it was the norm. Maybe it is, or maybe it's just an option. Either way I'm unsure and wanted that clarified, that's all.
It's mostly the other way around..
the Temple is responsible for the education of children and for the breeding of children.
the novices of the temple go through a couple of decades of bearing children before they become full priestesses...if they make it.
those children go to one of the branches of power that run and defend the city.. OR they can be taken in by couples or individuals who can't bear children of their own and/or have room for educating an extra child into their craft or profession.
sure, children can also be entrusted to the Temple, maybe to escape slavery, but for Zetan citizens the other direction is more likely.
that said, nothing is set in stone in that respect. what I described is the norm, but there are (and/or can be) exceptions.