Child malnutrition is a widely distributed and studied pathology. The approach through the concept of the thousand days improves the understanding of the process, as well as the opportunities for intervention that can have an impact on the eradication of the pathology and improve the quality of life of the child and the future adult. The present documentary research work addresses infant deficit malnutrition and describes the development from the moment of conception to 2 years of age around fetal metabolic reprogramming particularly in the third trimester of pregnancy and compensatory growth "Catch up", opens the window to malnutrition in the immediate postnatal period, In addition, the introduction of sensitive CANS core tools that allow early detection of fetal malnutrition by labeling patients within a group of high nutritional risk in conjunction with those who present explicit alterations of deprivation suffered in pregnancy. Thus, we propose a community strategy based on four axes: early diagnosis of subclinical malnutrition, prioritization of the quality of health services, quality of data collection systems and social participation that, articulated with governmental strategies, optimizes the economic, political and institutional aspects for the eradication of child malnutrition.