[Method] Hormonal implants [Consideration] 
The hormonal implant is an extremely effective method of birth control. The implant, which is about the size of a matchstick, is inserted under the skin on the inside of your upper arm. This releases hormones that prevent pregnancy for about 3 years. This method is convenient and does not require use every day or with each act of intercourse. With this method, you only need a new implant every 3 years. This method doesn't protect you from sexually transmitted infections. The most common side effect is irregular bleeding. Menstrual cycles also become shorter or stop completely.