関連ワード:  which method of contraception is most effective    which method of birth control is most effective in preventing pregnancy    which method of birth control is most effective    which method of birth control is most effective in preventing pregnancy quizlet    which method of contraception is the most effective when used correctly    which method of contraception is considered the most effective.reversible.form    which method of birth control is the most effective and risk free    which natural method of contraception is the most effective    which method of birth control is least expensive and most effective    which of the following method of contraception is highly effective but with poor reversibility  
結果 : which method of contraception is most effective