女性避孕药指甾体避孕药物 ,其作用是多环节的。主要有两方面作用 :一是中枢性抑制作用 ,通过干扰下丘脑、垂体系统抑制排卵 ;二是通过对生殖器官 ,特别是卵巢、子宫或子宫内膜及宫颈的直接作用。各种类型的制剂由于其配伍的雌、孕激素成分、剂量和剂型不同 ,其作用的主要环节 Female contraceptives refer to steroidal contraceptives, its role is multi-link. There are two main roles: First, the central inhibitory effect, by inhibiting the hypothalamus, pituitary inhibit ovulation system; the second is through the reproductive organs, especially the ovary, uterus or endometrium and cervical direct effect. Various types of preparations due to its compatibility of estrogen and progestin ingredients, dosage and dosage form different, the main part of its role