Overview Effectiveness of Supplemental Calcium in Preventing Postpartum Depression Status: Completed Trial end date: 2007-08-01 Target enrollment: Participant gender: Summary This study will evaluate the effectiveness of taking supplemental calcium while pregnant in reducing the risk of postpartum depression. Phase: Phase 4 Details Lead Sponsor: Oregon Health and Science UniversityCollaborator: National Institute of Mental Health (NIMH)Treatments: CalciumCalcium CarbonateCalcium, Dietary