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阴道避孕药(以下简称VCP)通常是指经阴道内给药,能够立即杀死或失活全部精子以阻止精子与卵子受精,从而达到避孕目的的药物。VCP如果使用得当,是控制人类生育的合理而有效的方法。它具有使用简便、安全、经济等优点,因而易被使用者接受;同时它无全身副反应,无需医学监护,基本上无禁忌症,因此在口服避孕药和宫内节育器广泛应用的今天,VCP仍然占有十分重要的地位。如Ethinylestradiol(37-乙炔雌二醇)原为口服药,因首过效应大,改为阴道使
Vaginal Contraception (hereinafter referred to as VCP) usually refers to intravaginal administration, can immediately kill or inactivate all sperm to prevent sperm and egg fertilization, so as to achieve the purpose of contraceptive drugs. VCP, if used properly, is a reasonable and effective method of controlling human reproduction. It is easy to use, safe, economical and other advantages, and therefore easy to be accepted by users; at the same time it has no systemic side effects, without medical monitoring, basically no contraindications, so in the oral contraceptives and IUD widely used today, VCP still occupies a very important position. Such as Ethinylestradiol (37-ethinyl estradiol) was originally oral medication, due to the first pass effect, changed to vaginal