Overview Vaginal Progesterone Versus Placebo in Multiple Pregnancy Status: Completed Trial end date: 2011-03-01 Target enrollment: Participant gender: Summary The purpose of this study is to see if daily use of vaginal progesterone will prevent preterm birth in women carrying 2 or more babies. Phase: N/A Details Lead Sponsor: University of CalgaryCollaborators: Calgary Health RegionJuniper Pharmaceuticals, Inc.Treatments: Progesterone