H. Ayon (1), M. Bermudez (2), E. Lara (3), S. Briones (3) (1) CETO extended screening area, student of master in clinical investigation Universidad de Guanajuato Mexico; (2) CETO coordination, perinatal medicine, Mexico; (3) Department of Medicine and Nutrition, University of Guanajuato, Mexico; (3) Department of Medicine and Nutrition, University of Guanajuato. Background: WHO defined as preterm, babies which are born before 37 weeks of gestation; this has family, social
