"as far as the effectiveness against pregnancy goes, skyla works amazing. my boyfriend of 6 years and i do not use protection and i have yet to get pregnant. that is about the only positive thing i have to say about skyla. everything else is terrible. the risk of it embedding into or perforating my uterus is also a monumental fear of mine. although i don&#039;t want kids now, i hope to have them in the future and my frequent cramps scare me even more that i may not be able to have children."