Desi Dwi Nurchasanah and Lintang Dwi Marti, “The Effectiveness of Metformin in Reducing the Risk of Preeclampsia in Patients with Polycystic Ovary Syndrome (PCOS) : A Systematic Review”, the int. j. of med. science and health, vol. 47, no. 2, pp. 157–199, May 2026, doi: 10.70070/0ek38k46.