Is it possible to get pregnant on the mirena?

Never say never: In medicine we learn not to say always or never. This form of BC has a failure rate less than 1%/yr. If it fell out it might be a problem. If you are concerned do a home pregnancy test.

Mirena IUD: The Mirena IUD is over 99% effective in preventing pregnancy. This means pregnancy is highly unlikely while using Mirena. It is a highly effective form of birth control.