But Ms. Sebelius said the data submitted on the drug didn't prove it was appropriate for girls to take Plan B without a prescription, and she overruled the agency to block the decision.

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

Obama and Health and Human Services Secretary Kathleen Sebelius have also questioned whether there's enough data available to show the morning-after pill is safe and appropriate for younger girls, even though physicians groups insist that it is.

NPR: Justice Department Appeals Morning-After Case