De la Vega, Alberto, and Maribelle Verdiales. “Failure of Intensive Fetal Monitoring and Ultrasound in Reducing the Stillbirth Rate”. Puerto Rico Health Sciences Journal 21, no. 2 (January 3, 2013). Accessed February 25, 2026. https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/886.