What should you know about NuvaRing hormones?

The hormones mainly prevent the ovary from releasing an egg. They also thicken cervical mucus, making sperm movement more difficult, and alter the uterine lining. Because hormones enter the bloodstream, the ring can cause effects beyond the vagina.

Possible effects include nausea, breast tenderness, headache, mood changes, spotting or changes in bleeding. These symptoms have many possible causes, so a new or severe symptom deserves an individual assessment rather than a guess about its cause.

Share your full medical history before starting, especially previous clots or stroke, migraine with aura, uncontrolled blood pressure, liver problems and smoking. Mention medicines used for seizures, tuberculosis, HIV or hepatitis C because some medicines can interact with hormonal contraception.

Use the ring according to its instructions and keep a record of symptoms during the first cycles. If side effects continue or interfere with daily life, ask about another method, including the [Combined Pill](/treatments/contraception-and-family-planning/combined-pill/). Do not stop suddenly without discussing pregnancy protection.

Seek emergency help for chest pain, breathlessness, coughing blood, a painful swollen leg, sudden numbness or weakness, or a sudden severe headache with visual or speech changes. These warning signs need prompt assessment.

Contact a clinician for heavy or persistent bleeding, severe abdominal pain, jaundice, a new migraine pattern, or mood symptoms that feel unsafe. They can review the ring and other possible explanations.

Ask which medical conditions or medicines affect your eligibility, whether your migraine history changes the choice, how to manage bothersome bleeding, and which non-estrogen options are available if needed.