A new survey by the Centers for Disease Control shows the use of the morning-after pill by teens has increased.

FOX News Radio's Tonya J. Powers has details.

The CDC's report says more than 1 in 5 sexually active teen girls has used the morning-after pill. A decade ago, that statistic was 1 in 12. The increase likely reflects that it's easier now for teens to buy it. The pill can be purchased without a prescription.

The report showed little recent change in most other types of birth control used by teen girls who have had sex. Almost all said they've used condoms at some point, and more than half have used the pill.

The morning-after pill can cut the chances of pregnancy by nearly 90 percent if taken within 72 hours of unprotected sex.

The CDC survey is based on interviews with about 2,000 people age 15 to 19 between 2011 and 2013.

Tonya J. Powers, FOX News Radio.