assessed not to be related to the use of the drug. Serious adverse events that were assessed as probably possibly related to the study included one case of depression, one intentional overdose of and a man who experienced an abnormally fast and irregular heartbeat after he stopped receiving injections. "More research is needed to advance this concept to the point that it can be made widely available to men as a method of contraception," Festin said. the injections were effective in reducing the rate of pregnancy, the combination of hormones needs to be studied more to consider a good balance between efficacy and safety.