This is a prospective mixed methods study to assess weight changes in women randomized to receive Implanon ® or Depo Provera® (DMPA) immediately postpartum compared to women who choose non-hormonal contraception or no contraception immediately postpartum. After enrollment, subjects return for a visit at 3, 6 and 12 months postpartum to be asked a series of questions, take a pregnancy test, and be weighed. Total length of participation for each subject is 1 year or until pregnancy.