{"nct_id":"NCT01670656","title":"A Study to Evaluate the Effect of Contraceptive Vaginal Rings on Primary Dysmenorrhea (P08257/MK-8175A/MK-8342B-057)","status":"COMPLETED","status_verified_date":"2022-02","start_date":"2013-01-21","start_date_type":"ACTUAL","primary_completion_date":"2013-09-11","primary_completion_date_type":"ACTUAL","completion_date":"2013-09-12","completion_date_type":"ACTUAL","phases":["PHASE2"],"tickers":["OGN"]}