Child undernutrition remains a highly prevalent condition in low and middle income countries and a major portion of the global burden of childhood malnutrition is found in South Asia with an estimated 74 million children living with chronic malnutrition (stunted growth) in this region. This burden of malnutrition accounts for approximately 50% of under five child deaths in developing countries. The risk of child death is also related to the severity of malnutrition and progressively increases the more the child's growth deviates from WHO Growth Standard, e.g. children with height-for-age <-3 Z scores from the standard have a four fold increased mortality risk compared to children within one Z score of the growth standard mean. Underweight in children for 18.7% of the global disability-adjusted life years in children less than five years of age. Childhood malnutrition is a pervasive problem in Bangladesh with 43% of children less than five years stunted in 2004 and 38% in urban child populations. An establish approach to promoting appropriate breastfeeding practices is through the use of local peer counsellors to provide information and to support to mothers. A recent study has conducted on pioneering research on this approach in Bangladesh.. The main aim of the study is to use a Cluster Randomized Control Trial (CRCT) to collect high-level evidence of whether peer counselling of women to promote appropriate breastfeeding and complementary feeding can improve feeding practices, child growth and reduce the prevalence of malnutrition in their children.