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.
1 The vaginal ring is an effective method of birth control. 2  The ring is also used to treat irregular periods, menstrual cramps, or endometriosis. 3  The ring releases hormones to stop the ovaries from making eggs.  The ring is left in the vagina for 3 weeks at a time.