“Comparing the Efficacy of Levonorgestrel Intrauterine Device and Oral Levonorgestrel for Emergency Contraception: A Systematic Review and Meta-Analysis”. Harvard Medical Student Review 11, no. 1 (August 1, 2026): 72–85. Accessed August 3, 2026. https://journal.hmsreview.org/index.php/home/article/view/7.