Progesterone implants were formerly designed as 6 small plastic sticks that contained small amounts of progesterone to be absorbed slowly into the body over a five year period. These sticks were surgically implanted just below the skin in the upper arm during a very simple in office procedure. The implants were removed from the consumer market several years ago and redesigned as two sticks that provide two years of contraception. The implantation and removal procedures are the same as the six stick counterpart. These implants have a high efficacy rate and are low/no maintenance. They contain no estrogen.