This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Social & Preventive Medicine
Injection DMPA is given once in ? 
Select and explain. 
A. 3 days, B. 3 week, C. 3 months, D. 3 years
C: 3 months
Answer: C: 3 months 
Explanation: 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.