• Slowly and continuously releases the hormones estrogen and progesterone into the bloodstream.
• Prevents the ovaries from releasing eggs.
• Changes mucus at cervix, which prevents sperm from entering the uterus to fertilize egg.
  
   

• One transparent, flexible 2-inch ring is inserted into the vagina once a month for a period of 3 weeks (21 days) and is then removed.
• A new ring must be inserted after 7 days.
  
   

• Easy to use.
• No exam needed.
• Very effective.
• Likely to attain same benefits as pill users.
• Easily reversible.
• Can be dispensed without a pelvic exam after a medical history and blood pressure are taken.
• No pill to take every day.
  
   

• Minor reactions may include: headache, increased vaginal discharge, vaginal irritation or infection, nausea.
• May slip out.
• No protection against STIs/HIV.
• Certain medications (seizure medications, antibiotics, antifungals, or anti-HIV protease inhibitors) may decrease effectiveness.
• May cause a change in vision or the inability to wear contact lenses.
• Medical risks: Increased risk of blood clots, liver tumors, heart attack and stroke in women with certain risk factors, medical conditions and those who smoke.
  

Effectiveness: 99%

More information on NuvaRing.