One vial containing medroxyprogesterone acetate 150 mg every 3 months, given deep IM. It should be certain that the recipient is not pregnant in the 1st injection. For this purpose, it is recommended to give the injection during the first 5 days after the onset of a normal menstrual period, if not breastfeeding, within the first 5 days of postpartum, and after the 6th postpartum week if breastfeeding.