Etonogestrel
"True effectiveness against pregnancy but I would definitely not recommended it!!! I had to get it removed!!!! I literally had a head ache that never went away!! Major migraines! I had lower back pain as if I was getting contractions.. I was so miserable! I could also feel it poking out through my skin! If you grabbed me touched a certain way it would hurt! I know taking the pill is a drag but I think out of all the methods that's the best!"