This is a good question from Margherita, and one that is asked by many women. The subdermal implant is inserted into the subcutaneous tissue of the arm, between the bicep and tricep muscles, in order to avoid the large blood vessels and nerves that lie deep in the connective tissue. This way, the daily release of small, predetermined quantities of the progestin hormone is guaranteed for the entire 3 year period that is recommended for the method’s contraceptive activity.
Studies have documented that this forearm position is optimal.
