I was in high school when the "Baby think it over" dolls came out, and I know for a fact those things kept a couple of girls from getting in the family way.
Before those came out, our schools had...five pound bags of flour that were handed out to kids that thought they would try parenthood. They came with a logbook that you were suppose to write down when you fed, changed, played with your "baby", and you brought it in to the teacher in charge of the program once a week to look at the logbook and see how your bundle of joy was doing.
Some kids did ok, most didn't, one kid lost her baby because grandma needed some flour and killed her grandchild.
I took care of my infant nephew often, so I didn't need practice with a bag of flour or robot doll.