Suárez-Calderón, D. M., & Díaz-Yamal, I. (2008). Progesterone receptor antagonists (PRAs) and progesterone receptor selective modulators (SPRMs): applications in gynaecology and obstetrics. Revista Colombiana De Obstetricia Y Ginecología, 59(1), 31–37. https://doi.org/10.18597/rcog.428