Learn more about injection contraception two years Depo-Provera Depro-Provera® Depo-Provera an injection of hormones two years Depo-Provera Depo-Provera Depo Provera Depo-Provera Depo Provera WebMD (Depo Provera) Depo-Provera Injection. Depo-Provera shot Learn More that is effective at preventing pregnancy Depo-Provera Depo-Provera Depo Provera