Why Have Teen Pregnancies Plummeted to a 30-Year Low?

No Contraceptive UseLess Effective... (withdrawal, spermicide, etc)Moderately... (condom alone)Highly... (IUD, pill, other hormonal)
199016.68.328.644.3
2006-201017.96.116.359.8
% of Teenagers, Aged 15-19
Sources: cdc.gov nejm.org slate.com