[REBOUND EFFECT OF INTERVENTION PROGRAMS TO REDUCE OVERWEIGHT AND OBESITY IN CHILDREN AND ADOLESCENTS; SYSTEMATIC REVIEW].

Background: studies show that overweight and obesity are the result of a complex interaction between genetic and environmental factors that begins prenatally. In evidence of this relationship the potential impact of prenatal nutrition experience in the development of the endocrine and neuroendocrine systems that regulate energy balance, with special emphasis on leptin, an adipocytederived hormone. Different authors relate the risk of obesity with rapid weight gain in the first years of life.