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当今全世界每分钟平均有140多个婴儿降临人间,每年增加7千万人口。如按此速度继续增长,到本世纪末,全球人口将突破60亿。据报道,地球的可耕地面积仅占总面积的3％,要养活60亿人口,无疑会产生巨大困难。因此,有效地控制人口已成为各国共同关心和迫切需要解决的课题。现就国内外生育调节研究的进展综述如下: 现用节育方法的开发研究一、甾体激素避孕药:当前普遍使用的甾体激素避孕药主要有口服避孕药及长效避孕针.前者是雌激素与孕激素的复合片,后者主要是长效甲孕酮或甲地孕酮,两者的作用机制均为抑制排卵。口服避孕药自1960年应用
On average, there are over 140 infants per minute in the world today, an increase of 70 million people each year. If this rate continues to grow, by the end of this century, the global population will exceed 6 billion. According to reports, the earth’s arable land covers an area of only 3% of the total area. To feed six billion people will undoubtedly create tremendous difficulties. Therefore, the effective control of the population has become a topic of common concern and urgent need to be resolved by all countries. Now on the domestic and foreign research on the regulation of reproductive progress are summarized as follows: Development and application of birth control methods, steroid hormonal contraceptives: the most commonly used steroid hormone contraceptives are mainly oral contraceptives and long-acting contraceptives. The former is female Hormones and progesterone composite tablets, the latter is mainly long-acting progesterone or megestrol, the mechanism of both inhibition of ovulation. Oral contraceptives since 1960 applications