Ovaprene Non-hormonal Vaginal Meshed Ring Study

Dare Study Image

This study is investigating OvapreneTM, a non-hormonal vaginal meshed ring being developed as a potential new contraceptive. There are currently no non-hormonal vaginal contraceptive rings that have been approved for use by the FDA in the United States. This study is intended to help find out how well the study ring works in preventing sperm from getting into a woman's cervical mucus (the fluid at the opening to the uterus, or womb), to understand how easy it is to put in and take out the study ring, and how well the study ring fits. This study will also look at how the active ingredients are released from the study ring and the overall safety of the study ring.


  • You are between the ages of 18 and 50
  • You are protected from pregnancy by female tubal sterilization
  • You are in a mutually monogamous relationship for at least the past four months with a male partner who is at least 18 years old, non-sterile (no history of vasectomy or sperm dysfunction), and willing to participate
  • You are willing and able to abstain from or engage in intercourse with and without condoms at specific times in the study
  • You are in good general health
  • You have regular menstrual cycles


Qualified participants will receive all study related materials and exams at no charge and will be compensated up to $2,175 for their time and travel.

Who do I contact for additional information?

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