Singh, A., P. Mani, S. Prateek, L. Yadav, and E. Gupta. “Impact of Levonorgestrel Intrauterine System on Metabolic Parameters”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 8, no. 3, Feb. 2019, pp. 830-4, doi:10.18203/2320-1770.ijrcog20190433.