Lancashire Sexual Health logo and Blackpool Sexual health logo

RING (Nuvaring / SyreniRing)

A small, flexible plastic ring is put into the vagina and releases estrogen and progestogen.

It stops ovulation, thickens cervical mucus, and thins the lining of the uterus.

99% effective if used correctly



  • You don’t have to think about it every day (only every 3 weeks)
  • No link to weight gain
  • Usually makes bleeding regular, lighter, and less painful
  • Fertility returns immediately once it is stopped, with no long-term effects
  • Suitable until age 50 for non-smokers with no health concerns
  • Can reduce the risk of some cancers
  • You can choose not to have a monthly bleed


  • Not suitable if you are a smoker aged over 35, overweight or have certain medical conditions
  • Small risk of serious side effects including blood clots or breast or cervical cancer
  • May experience temporary side effects including headaches, nausea, breast tenderness or mood changes
  • No protection against STI’s
  • Possible skin irritation
  • It can be seen


  • Not affected by diarrhoea and vomiting, as not absorbed by the tummy
  • Need to be aware of missed ring guidance and how to access emergency contraception if necessary
  • Some medicines may reduce the effectiveness of the patch
  • Break through bleeding and spotting is common at first

Further Information: