<prompt> Injection DMPA is given once in ?3 days3 week3 months3 years  <response>: Ans. is c i.e., 3 months Depot formulations Injectable hormones They are given i.m. as oily solution 1. Long acting progestin alone Depot medroxy progesterone acetate DMPA 150 mg at 3 month intervals. or Norethindrone norethisterone enanthate NEE 200 mg at 2 months intervals. The most impoant undesirable propey is complete disruption of mestural bleeding pattern and total amenorrhoea more common with DMPA. 2. Long acting progestin long acting estrogen - once a month. 