The purpose of this study is to determine the acceptability of randomization to contraceptive options and estimate the effect of progestin contraception on HIV genital shedding and inflammatory/immune perturbations in women who may or may not be on antiretroviral therapy, as well as in HIV-uninfected women controls. It is hypothesized that progestin-containing contraception will lead to inflammatory changes that may affect the local immune activity, influencing HIV acquisition or transmissibility risk.