This study evaluated the pharmacokinetic profile of medroxyprogesterone acetate (MPA) following injection of Depo-SubQ Provera 104 (DMPA-SC) in the upper arm, a preferred injection site in developing countries. Injection of Depo-SubQ Provera 104™ in the upper arm provided sufficient MPA levels for contraceptive protection for 3 months (13 weeks). The uptake and metabolism of MPA when injected in the upper arm may be different from the abdomen and thigh.