Prof. Dr. Sathirakorn Pongpanich, Dean, The College of Public Health Sciences, Chulalongkorn University, Assoc. Prof. Dr. Rossarin Gray, Director of the Institute for Population and Social Research, Mahidol University and Assoc.Prof.Thanya Subhadrabandhu, Acting Director of ASEAN Institute for Health Development, Mahidol University gave the opening remarks in The 9th International Graduate Students Conference on Population and Public Health Sciences. This International Conference has been conducted annually upon the continued collaboration among three WHO CC Institutes which are the College of Public Health Sciences (CPHS), Chulalongkorn University, the ASEAN Institute for Health Development (AIHD), Mahidol University and the Institute for Population and Social Research (IPSR), Mahidol University. The event was held at Conference Room 220, Institute Building 2, College of Public Health Sciences, Chulalongkorn University. IPSR students gave eight oral presentations and two poster presentation.