There are many reasons why you might think you are pregnant. Our biology pushes us to take sexual risks... we all know we should be practicing safer sex, but in the heat of the moment we all fail from time to time. (especially when there is a combination of stranger and ovulation)

The morning-after pill is a medicine that is based on a hormone that reduces the chance of fertilization. This way the chance of getting pregnant becomes smaller. It is not a pill that introduces abortion, and it should be taken only for emergencies. Be sure to talk to your daughters, there is a lot of morning-after pill abuse by young girls. 

It should be used in cases where the usual contraception has failed or you didn't take the time to use it.