Knowledge of any method is classified into modern, traditional and folkloric methods as follows: Modern methods are Pill, IUD, Injections, Diaphragm, Condom, Female Sterilization, Male Sterilization, Implants, Lactational amenorrhea, Female condom and Foam/Jelly. Traditional methods are Periodic Abstinence (Rhythm), Withdrawal, and Abstinence. Folkloric methods are the category "other" and any other country-specific methods. If a respondent knows both a traditional method and a modern method then the modern method takes priority and he is coded as knowing a modern method. Similarly, if a man knows a traditional method and a folkloric method, the traditional method takes priority.