How are Skyla and Kyleena different from Mirena?

Skyla, Kyleena, Mirena, and Liletta are all types of hormonal IUD and they are all pretty similar. Skyla and Kyleena have a lower dose of hormones than Mirena and Liletta, which means that they don’t last as long. Skyla has the lowest dose and lasts for up to 3 years, Kyleena lasts up to 5 years while Mirena and Liletta last for up to 8 years. Also, Skyla and Kyleena are slightly smaller than Mirena and Liletta, although all IUDs are safe for most everyone with a uterus to use.