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自然避孕法(NFP),是指不用药物,不用工具的避孕方法,本法最符合生理要求.人的成熟卵子自卵巢排出后存活1天即将死亡,精子在女性生殖道内可存活1～3天.如果在卵子存活的时间里未与精子相遇将不能使其受精,从而达到避
Natural Contraceptive Method (NFP) refers to the method of contraception that does not use drugs or tools and this method is the most suitable for physiological requirements. The mature ovum of human beings is about to die for 1 day after the ovaries have been excreted, and the sperm can survive in the female reproductive tract for 1 to 3 days If the egg does not meet the time of sperm survival will not be able to make it fertilized, so as to avoid