Emergency contraception.

Emergency contraception (EC) is an effective way to prevent an unintended or unplanned pregnancy. EC is available in two forms in Canada: a progestin-only method and a combined hormonal method, also known as the Yuzpe regimen. EC has been proven to be most effective within 72 h and up to 120 h after unprotected sexual intercourse. To date, the progestin-only method is the preferred method of EC recommended to teens because it is known for higher efficacy and fewer side effects, and is, therefore, more widely accepted over the combined method. Teens should also be counselled that the progestin-only method is widely available without a doctor's prescription across Canada.