Tiwari, K., Khanam, I. and Savarna, N. 2018. A study on effectiveness of lactational amenorrhea as a method of contraception. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 7, 10 (Sep. 2018), 3946–3950. DOI:https://doi.org/10.18203/2320-1770.ijrcog20183837.