On the off chance that you knock up a twelve year old at one of the dances...
- they won't see you again for another five years.
- she's not going to start showing for a couple months, when she's with her own family.
- there is literally no way to identify who the father is at all.
This is traditional living, frankly, and currently you'd have to go as far as... Ireland or the northern parts of Sweden, where everyone was pressed into. (and some fucked-up ethnocidal shit, a good chunk of it 1947-2010)
It has been illegal to be a person at a location where a drum is present since 1994. And no, most of the populace of sweden is just some illegal immigrants that showed up one day.
But... yeah. That's traditional life. Some twelve year olds want a baby. Some don't. And it's completely impossible to identify some guy you only saw once for a few hours a decade ago.
So, I'd go a bit farther than "casual nonpromotion." How 'bout "a military campaaign of counterethnocide is necessary to cleanse the land and heal the balance.