There was NO sex education in the govt. schools until the 1960s and guess what? Up until then It was extremely rare for teens to get themselves knocked up. And no, they didn't run off to an abortionist either. They just didn't have intercourse because it wasn't accepted.
Sex education has wrought nothing but younger and younger kids indulging in sex that they shouldn't even be having & a 41% illegitimacy rate. Time to bring back stigma and shame - it works!