Implant Extension Study

Merck Extension Study Photo

 The etonogestrel implant is approved for use to prevent pregnancies for up to 3 years. It has not been approved to use for more than 3 years. This trial will also study the amount of etonogestrel hormone that is released from the implant into your body when it is used for more than 3 years.                                                                                      

This trial is being done to find out if using the etonogestrel implant (MK-8415) for more than 3 years:      

  • Is safe
  • Is tolerable    
  •  Continues to prevent pregnancy
  • Affects the menstrual cycle
  • Causes complications when it’s removed                                                                                                      


  • Using an etonogestrel implant as your only method of contraception for at least 36 months
  • Are 35 years or younger
  • At risk for pregnancy


You may be compensated $75  per completed visit to cover the cost of your time and travel. Additional travel expenses may be covered. This will be discussed with you by the trial doctor or trial staff. You will be reimbursed after each study visit.    You will be compensated $30 per month for completion of the daily electronic diary.

Whom do I contact for additional information?

To find out more information and to learn if you are qualified to participate, fill out the online form or call the Women's Health Research Unit confidential recruitment line at 503-494-3666 or email us at