1,306
Participants
Start Date
June 30, 2000
Primary Completion Date
November 30, 2013
Study Completion Date
November 30, 2013
University of Pennsylvania Reproductive Research Unit, Philadelphia
University of Miami, Miami
University of Southern California Women's and Children's Hospital, Los Angeles
Bill and Melinda Gates Foundation
OTHER
National Institutes of Health (NIH)
NIH
University of Pennsylvania
OTHER