Jain, M. G.; Mazumdar, M.; Jain, N. K. A Study to Compare the Efficacy, Acceptability and Side Effect of Combined Contraceptive Vaginal Ring With the Combined Oral Contraceptive Pills in a Tertiary Health Centre Located in Central India. Int J Reprod Contracept Obstet Gynecol 2020, 9, 3208-3214.