Fertility Trends and Determinants in North Sumatra Province, Indonesia (1990–2040): A Longitudinal Analysis - Eva, Kosasih; Cokorda, Istri Sintya Dwi Mirah Cahyani; Ni, Wayan Rusniati; Desak, Putu Eka Nilakusmawati (International Journal of Multidisciplinary Research and Growth Evaluation, 2025)