NuvaRing shop online is a flexible contraceptive ring that comes in small sizes about the size of a silver dollar. This ring is an excellent, birth control option for females. It prevents unwanted pregnancy. NuvaRing is composed of a combination of hormones such as estrogen and Progestin. During the menstrual cycle, this ring helps to prevent ovulation i.e., the release of an egg. It increases the thickness of the vaginal fluid which helps to prevent the contact of sperm with egg fertilization. It also alters the lining of the uterus to avoid the attachment of the egg. When a fertilized egg failed to get attached to the uterus then it will be passed out of the body.