Girls of any age can now buy emergency contraception pills without a prescription.
The order was issued by the 2nd U.S. Circuit Court of Appeals in Manhattan.
The ruling allows a generic two-pill version of emergency contraception to be sold over the counter and without any age restrictions. However, it doesn't allow the sale of Plan B One-step.
The Center for Reproductive Rights applauded the move.
One executive said, "it'll be like buying Tylenol."
The Food and Drug Administration was preparing in 2011 to allow over-the-counter sales of the morning-after pill with no limits when Health and Human Services Secretary Kathleen Sebelius overruled her own scientists in an unprecedented move.
However, the FDA announced in early May that Plan B One-Step could be sold without a prescription to those 15 and older. Its maker, Teva Women's Health, plans to begin those sales soon. Sales had previously been limited to those who were at least 17.
Meanwhile, opponents argue that parents and medical professionals should be involved in major medical decisions involving young girls.