One of the most commonly used long term birth control injections (hormonal) is the Depot Medroxyprogesterone Acetate (DMPA) or Depo Provera. The substance used in the injection actually makes the survival and entry of sperms into the uterus difficult by changing the lining of the uterine and by allowing the cervical mucus muscles to thicken.

Such a reaction on the part of the body after being injected with DMPA is attributed to the high degree of progesterone contained in the dose, which also hinders the ovary from producing more eggs, thereby reducing the chances of fertilization.

There are many side effects associated with using the DMPA; with weight loss/gain being one of the most commonly experienced ones by almost 70% of the users. Although, weight gain and change is something that is always accompanied with any hormonal drug usage, it can still be overcome by leading a healthier lifestyle and by exercising regularly.