The social control of stigma will incent couples into behavior which does not cause crisis to their own lives. A social stigma for deadbeat dads, or men who abandon women after they have gotten them pregnant needs to be applied. The burden to act responsibly with respect to reproduction falls equally on the shoulders of both participants, but the price of failure biologically falls unevenly on the women involved. Thus a counter weight, a disincentive to keep men from acting irresponsibly needs to be in place. Law enforcement needs to be equipped with the tools to track men like this, and to be able to enforce the penalties of being sexually irresponsible.
Education needs to play a central role.
While teaching the biology of sex is a positive step, leaving out the values that guide a healthy reproductive cycle is dangerously foolish. Neither a single man nor woman is able to care for the needs of a child as well as a two parent family. The human race is divided into two sexes, and it is best for children to see a healthy example of both. Teenagers need to be exposed to the rigors of parenthood at home and at school. Obviously this is an idealistic vision, but I believe that is the crux of the matter, ideals.