The ring is a small, bendable insert that stays in your vagina. You leave it in for three weeks at a time and take it out for the fourth week. The ring prevents pregnancy in two ways. It releases hormones that prevent ovaries from releasing eggs, and it thickens your cervical mucus to block sperm from getting to the egg in the first place.
In South Africa we can find the Nuva Ring, have you tried it? Share your experience or questions.