Standard questions about infant feeding practices used in the Bangladesh DHS surveys[6] will be used to monitor these patterns at the 3 monthly data collection periods from birth till 18 months of age. These will include questions about current breastfeeding status, current use of other liquids and solid foods, timing of introduction of other liquids or solid foods, use of bottles for feeding and information about who is providing advice about infant feeding amongst family and friends. Ten percent of the interviewer's scheduled visits will be monitored by one of the Senior Research Assistants or Principal Investigators or Investigators. The questionnaires will be checked daily, and if the information is incomplete or not clear, the supervisor will return to the home on the next day to complete the data form. Mother's reported infant feeding practice will be verified by a 4-hour observation period that will take place by unscheduled visits by Senior Research Assistants or Principal Investigators or Investigators.