Lawrence AO, Chibuzo AL. VARIATION OF PRENATAL ULTRASOUND-ESTIMATED CEPHALIC INDEX; A COMPARATIVE STUDY OF IGBO, HAUSA AND YORUBA ETHNIC GROUPS IN NIGERIA. JRRS [Internet]. 2026 Jan. 29 [cited 2026 May 24];32(1):76-80. Available from: https://jrrs.org.ng/index.php/home/article/view/72