Before revision: Multiple methods of male hormonal contraception have been tested in clinical trials , and although one trial was halted early, leading to a large amount of press attention, most hormonal male contraceptives have been found to be effective, reversible, and well-tolerated.
After revision: since the 1990sMultiple methods of male hormonal contraception have been tested in clinical trials , and although one trial was halted early, leading to a large amount of press attention, most hormonal male contraceptives have been found to be effective, reversible, and well-tolerated.