De la Vega, Alberto, Maribelle Verdiales, and Gloria Leavitt. “Method of Risk Assessment Affects Acceptance Rate of Amniocentesis”. Puerto Rico Health Sciences Journal 21, no. 3 (December 27, 2012). Accessed December 19, 2025. https://prhsj.rcm.upr.edu/index.php/prhsj/article/view/874.