Morning after pills, like Plan B, are technically sold over-the-counter.
That means you could pick them up from a pharmacy just like you could Aspirin or something.
But because of federal law, birth control can't be sold to girls under the age of 17.
Girls 16 and younger need a prescription.
The American Academy of Pediatrics (AAP) has recommended that pediatricians routinely talk to their teen patients about emergency birth control and to write them prescriptions for morning-after pills.
So then if a girl does have sex, and regular birth control does fail (exploding condoms), she'll be able to get her pills right away.
Morning-after pills can work up to 120 hours after sex but they work best if taken within the first 24 hours.
The AAP said: