LAWRENCE, Ayang, O.; CHIBUZO, Abonyi, L. VARIATION OF PRENATAL ULTRASOUND-ESTIMATED CEPHALIC INDEX; A COMPARATIVE STUDY OF IGBO, HAUSA AND YORUBA ETHNIC GROUPS IN NIGERIA. Journal of Radiography and Radiation Sciences, [S. l.], v. 32, n. 1, p. 76–80, 2026. DOI: 10.82547/jrrs.vol32no1.72. Disponível em: https://jrrs.org.ng/index.php/home/article/view/72. Acesso em: 24 may. 2026.