口服避孕药在我国育龄妇女中已被广泛应用,它一般可分为两大类:即混合型与时序型。混合型为雌激素与孕激素的混合物,在月经周期的第五天开始,连服22天;时序型服药于月经周期的第一阶段单独用雌激素,后期则与孕激素并用。不论服用哪一类药物,都能起到抑制卵泡发育、成熟及排卵的作用,以达到避孕的目的。国外学者于1972年就强调指出:口服避孕药能改变妇女对一些维生素和矿物盐的需求,但一直没有引起人们的重视。近年来在临床实践中发现,口服避孕药后,可引起妇女体内叶酸、维生素 B_(12)、抗坏血酸、核黄 Oral contraceptives have been widely used in women of childbearing age in our country. They generally can be divided into two categories: mixed type and sequential type. Mixture of estrogen and progesterone mixture, starting in the fifth day of the menstrual cycle, and even served for 22 days; timing type medication in the first phase of the menstrual cycle alone with estrogen, and later with progesterone. No matter what kind of medication taken, can play a role in inhibiting follicular development, maturation and ovulation in order to achieve the purpose of contraception. Foreign scholars stressed in 1972 that: oral contraceptives can change women’s demand for some vitamins and mineral salts, but it has not attracted the attention of people. In recent years in clinical practice found that oral contraceptives can cause women’s body folic acid, vitamin B_ (12), ascorbic acid, nuclear yellow