Chauhan, M., Gupta, N., Dwivedi, S., & Agarwal, S. (2017). A study to compare the efficacy of ormeloxifene with norethisterone and conventional oral contraceptive pills. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 6(10), 4469–4472. https://doi.org/10.18203/2320-1770.ijrcog20174426