Where were Norplant implants tested?
Norplant implants were tested in four developing and four developed countries, including the United States. In addition, many countries have conducted preintroduction studies to obtain data on local experience with the method and to train providers in insertion, removal, and counseling techniques. By 1991, when the method became available in the United States, Norplant implants had been studied in clinical trials and preintroduction studies involving over 55,000 volunteers in more than 40 countries.