The primary problem with the contraceptive idea is that the necessities of science and nature often run headlong into cultural norms, which are incredibly difficult to change. For instance, in those regions of the world that currently have the greatest population growth, a larger family means free labour, and therfore a greater income. Also, there are regions where having as many children as possible is an integral part of the local culture, and as I mentioned above, it is difficult to go up against such deeply ingrained perceptions.

Contraceptives of all kinds should, of course, be (heavily) supported and touted, both by governments and non-governmental groups. In the end, however, the decision is entirely up to the people who would be taking them.

(Ironically, education has been shown to be the best long-term contraceptive. Worldwide statistics show that the more education a woman has, the fewer children she is likely to bear. Of course, education comes with its own set of problems.)