After insertion, the NuvaRing ( contraceptive ring) is left in the vagina for 3 weeks before removal. Then contraceptive ring is removed for one week during which bleeding occurs and new ring is used for each month.
NuvaRing must be inserted into vagina , its 4 week cycle it removed after 3 weeks it means 21 days and then new ring is used . Regularly check that NuvaRing to ensure that you are protected for unwanted pregnancy.
NuvaRing is an effective hormonal contraception if inserted for four weeks , but the manufacturer recommends removing it for ring free week before used a new ring.
To learn more about hormonal contraception here
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