[A randomized study comparing the efficacy and bleeding pattern of Implanon and Norplant hormonal contraceptive implant].

Objective: To compare the contraceptive efficacy, tolerability and bleeding patterns of Implanon and Norplant.

Methods: One hundred healthy female volunteers received either Implanon (75 cases) or Norplant (25 cases) for 4 years, followed up with complain, bleeding patterns, hemoglobin, blood pressure, weight. Record the time of insert and remove.