There was a slight increase in use among 16-19 year olds in 2001 when the change in availability of the emergency pill was made, but this dropped back down again in 2002.

BBC: Cutting the cost may increase uptake further

The Plan B emergency contraceptive pill works by preventing ovulation or by blocking a potentially fertilized egg from becoming implanted in a woman's uterus, according to the drug's label.

WSJ: Corrections & Amplifications

The Food and Drug Administration denied a petition Monday by a reproductive rights advocacy group that sought to lift all prescription requirements for an older version of the Plan B emergency contraceptive pill on the eve of a federal court hearing on the issue.

WSJ: FDA Keeps Limits on Other 'Plan B' Contraceptive

They say lowering the age to 15 for purchasers of the morning-after pill makes emergency contraception available for women of all ages.

NPR: 10 Things To Know For Today