Rahman, Muhammad Nurhadi, Djaswadi Dasuki, Hendy Hendarto, Jimmy Yanuar Annas, Shinta Prawitasari, Muhammad Lutfi, Sarrah Ayuandari, et al. “Clinical Performance and Levonorgestrel Levels of Sinoplant and Indoplant After Five Years of Continuous Use”. Indonesian Journal of Obstetrics and Gynecology 14, no. 3 (July 27, 2026). Accessed September 30, 2026. https://inajog.com/index.php/journal/article/view/3121.