Concepcion was also dubbed the "Mother of Asian Demography" because of her contributions in population studies and policy within the region.

From 1953 to 1954, she studied Biostatistics at the University of Sydney School of Hygiene and Public Health under the Colombo Plan Fellowship.

[1] Years later, she received another fellowship from the Population Council of New York to pursue a Ph.D. in Sociology from the University of Chicago.

[5][6] In the late 1970s and early 1980s, she headed the Organization of Demographic Associates (ODA) composed of population institutes in Asia.

She also chaired the Steering Committee on the Social and Psychological Determinants of Fertility Regulation of the World Health Organization.

[8] Adding to the list of roles, Concepcion has also served as a consultant for several international organizations such as the United Nations Population Fund, the UN Development Fund, the UN Statistical Office, the UN Training and Research Institute for the Advancement of Women, and the Economic and Social Commission for Asia and the Pacific.