Purpose of the study is to investigate safety and contraceptive efficacy of an LNG-containing intravaginal ring.

Inclusion Criteria:

• Healthy female subject requesting contraception and willing to use the IVR
• Normal or clinically insignificant cervical smear not requiring further follow up (a cervical smear has to be taken at screening visit or a normal result has to be documented within the previous 6 months)
• History of regular cyclic menstrual periods
• Subject is willing and able to attend the scheduled study visits and comply with study procedures

Exclusion Criteria:

• Pregnancy or lactation (less than three months since delivery, abortion, or lactation before start of treatment)
• Any diseases or conditions that can compromise the function of the body systems and could result in altered absorption, excessive accumulation, impaired metabolism, or altered excretion of the study drug
• Any diseases or conditions that might interfere with the conduct of the study or the interpretation of the results
• Any disease or condition that may worsen under hormonal treatment according to the assessment and opinion of the investigator
• Undiagnosed abnormal genital bleeding
• Wish for pregnancy during the study
• Major surgery scheduled during the study period