Emergency Contraceptive Disparities Study

EC Disparities Study Image

This study is being conducted to learn more about why some people are at greater risk for oral emergency contraceptive failure while others are not. We are hoping to find out if genetic differences impact the risk of emergency contraceptive failure. The drug used in this study is the FDA approved oral emergency contraceptive pill containing ulipristal acetate (UPA, otherwise known as Ella©). The overall goal of this research is to improve the effectiveness of emergency contraceptive pills for all people. The study will test to see how well the drug (UPA) works on the ovary as well as to gather more information in women of varying race and ethnicity.

You may be eligible for this study if:

  • You are a woman between 18-40 years of age
  • You have normal menstrual cycles
  • You are willing to use non-hormonal contraception, like condoms, during the study
  • You are not using a hormonal form of birth control
  • You agree to have genetic testing completed as part of your study participation


This study includes up to 15 visits over 2 months and compensates up to $885 for time and travel.

Contact 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 whru@ohsu.edu.