This one-year observational study will monitor the contraceptive effectiveness, safety and acceptability of Zarin during the first year of use after the method has been approved for public use in Madagascar. It will be implemented by Marie Stopes Madagascar with technical support from Marie Stopes International and FHI. 300 women of reproductive age who selected Zarin as their primary method of contraception will be enrolled in the study at the MSM outreach sites and static clinics.