Depot medroxyprogesterone acetate and norethisterone enanthate are two long acting intramuscular injections used for contraception. It acts by inhibiting ovulation, by suppressing the reproductive hormone release from pituitary gland. The endometrium becomes thin and etrophic preventing the implantation of fertilized egg. After stopping the injection the body needs time to revert back the hormones, the return of fertility depends on duration since how long you have been using the injection. Average return of fertility is 9-10 months with DMPA, 4-8 wth norethisterone enanthate. Studies shoe that 68% become pregnant after 12 months and 83% after 15 months.
