There are four different types of volcanoes. A volcano is categorized both by formation and appearance. Different types of volcanoes also indicate the types of expected eruptions. The different types of volcanoes are: composite (or stratovolcanoes), shield, cinder cones and spatter cones.
A Vaginal Ring is a thin, transparent, flexible ring that you insert into the vagina yourself to provide contraception protection. Leave the Vaginal Ring in for 3 weeks while it slowly releases estrogen and progestin hormones into the body.
Nuva Ring is a flexible ring about the size of a ponytail holder that is full of hormones. It is a form of birth control that provides the hormones vaginally instead of orally. You place it inside your vagina towards the cervix and leave it there for 3 weeks. The Proper Use of NuvaRing Contraception NuvaRing was the first vaginal birth control method. 2  It is a plastic, flexible ring a woman inserts into her vagina monthly to prevent pregnancy.