Michael Hambidge, MD, ScD, Professor Emeritus, Department of Pediatrics at the University of Colorado School of Medicine, is the principal investigator of this project. The first goal of this study is to determine the effects of a daily maternal Zn supplement (early pregnancy – 9 mos post-partum) on maternal cognition and temperament, fetal and infant brain growth, maternal-infant interaction and on cognition and temperament in early-mid infancy. The effects of three different doses of Zn supplement (0, 10 and 20 mg Zn) will be compared. The second principal goal is to determine the effects of a 3 mg Zn/day supplement for infants aged 6-9 mos, the offspring of each of the maternal intervention groups, on infant cognitive and motor development and on temperament. This project was conducted between July 2007 and May 2011. You may contact Dr. Hambidge at firstname.lastname@example.org.