Trained research assistants will collect anthropometric measurements (weight and height) using established methods[9] and will record these measurements on both the research instruments and an infant growth chart for the mother to hold.. These measurements will be standardized before and during the data collection. Anthropometry will be collected soon after birth and at 3 month intervals (3, 6, 9, 12, 15 and 18 months). The 2006 WHO Growth Standard will be used to construct anthropometric indices and standard WHO recommended indicators will be used to assess stunting (Height-for-age <-2 Z), wasting (weight-for-height <-2 Z) and underweight (weight-for-age <-2 Z).