This is a pilot randomized controlled trial to assess the effects of advanced supply of emergency contraception versus routine care in a teen postpartum population. The goals are to assess feasibility of recruiting and retaining postpartum teens; to obtain estimates of the prevalence of (use of Plan B, primary contraceptive continuation, unprotected intercourse exposure, and pregnancy rates), in postpartum teens given advanced supply of Plan B; to assess whether or not (lack of use of Plan B, contraceptive method non-continuation, and unprotected intercourse exposure), are surrogate markers for risk of unintended pregnancy.