De la Vega, A., Ruiz-Febo, N. and Chamorro-Roberts, Z. (2008) “Fetal ultrasound biometry: Normative charts for a Puerto Rican population”, Puerto Rico Health Sciences Journal, 27(1). Available at: https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/45 (Accessed: 24 December 2025).