Personally, I think that potential parents should have to study for, and pass, a test before they're ever allowed to have kids. Little things like "how to change a diaper" and "CPR for infants" as well as leaving a noisemaker in the next room that goes off every three hours that they have to pick up and cuddle to make it quiet down.
Also, things like basic training on treating kids equally, proportionate punishment for misdemeanours and so forth.
Now that I come to think of it, I'd say it should be a mandatory course covering about a month (a solid week of which involves the noisemaker in the next room, just to drive the lesson home) for 15-18 year olds. Give them an idea of what it's like to be a parent. (Also, put someone in the class who
is a parent, so the rest of them can see how someone who's already done it can breeze through).
I reckon the birth rate would
plummet.