Birth Control Hormonal Injection/Shot Study

Primary Objective

The purpose of this study is to test levonorgestrel butanoate as a possible long-acting and reversible injectable formulation for female birth control.

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This study is recruiting healthy female volunteers to participate in a 9-month study to test an investigational hormonal birth control for female birth control.

Main Procedures Involved: Visits will include physical exams, pelvic exams, trans-vaginal ultrasound, and blood draws. Participants will also be asked to complete daily bleeding diaries.

Duration of Participation: Participants will complete 36 visits over 9 months..


18 to 40 years


Healthy female volunteers with regular menstrual cycles who are not currently on hormonal birth control.




Comprehensive Women's Health Center
University of Colorado Hospital

Principal Investigator
Photograph of Nancy Fang,  MD, MS

Nancy Fang, MD, MS

Study ID

Protocol Number: 19-2820

More information available at NCT04143659

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