These research briefs explore the contraceptive use dynamics among 2,699 married women aged 15-49 in India who began using one of four modern, reversible contraceptive methods: interval intrauterine contraceptive device (IUD), postpartum IUD (PPIUD), injectable contraceptive, or oral contraceptive pill. The women, living in Odisha and Haryana states, were interviewed within one month of starting the method and again three months later. These findings will be useful to program designers, policy makers and health care professionals in delivering voluntary family planning services. Findings include reported quality of care received by contraceptive users at the time of method adoption and dynamics of contraceptive use three months later, including method continuation, switching, and discontinuation. The briefs also examine the role of husbands and frontline health workers in contraceptive use dynamics.