How effective is emergency contraception?

Levonelle  One Step®, the emergency contraceptive pill is 95% effective within 24 hours of unprotected sex, 85% between 25 - 48 hours and 58% if taken between 49 - 72 hours.

The IUD (intrauterine device) is almost 100% effective as a method of emergency contraception and is therefore the most effective way of preventing an unplanned pregnancy.

Where can I get Levonelle One Step®