Freya Lund Sonenstein directs the Population Studies Center at the Urban Institute. Since 1986 she has directed the National Survey of Adolescent Males which measures and tracks the reproductive behaviors of teenage males in the U.S.  A major focus of Dr. Sonenstein's research is teenage childbearing and its links with policy and programs, particularly regarding the male role in teen fertility. She has written extensively about teenage sexual risk taking and program interventions aimed at reducing risk. Her most recent publication is Involving Males in Preventing Teen Pregnancy: A Guide for Program Planners. She serves on the Demographic and Behavioral Science Study Section at the National Institutes of Health and on the Effective Programs and Research Task Force of the National Campaign to Prevent Teen Pregnancy. Between 1985 and 1989 Dr. Sonenstein co-directed the Program on Families and Children at the Florence Heller School of Advanced Studies at Brandeis University.  In 1983 she was director of demonstration programs and evaluation at the Office of Adolescent Pregnancy Programs, U.S. Department of Health and Human Services.