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目前虽已有多种避孕方法,以期做到有计划地安排生育时间,但迄今尚无一种方法能令人完全满意。各国科学家对此仍在继续研究,现分别介绍如下。一、工具避孕法利用工具防止精、卵接触,或通过改变宫腔环境达到避孕目的。 (一)宫内节育器(简称IUD) 自1957年在我国使用以来,至今已成为我国育龄妇女应用最广泛的避孕方法。宫内节育器种类繁多,不下数十种,目前仍在从形状、大小、材料等方面不断进行改进。其发展可分两个阶段。第一代IUD为惰性节育器,用没有活性的不锈钢或塑料制成,多数呈环形,包括我国应用最广的金属单环、金塑混合环,其它还有麻花环,太田环、优生环、节育花型、盾型、
Although there are a number of contraceptive methods currently available to arrange childbirth schedules in a planned manner, no method so far has been entirely satisfactory. The scientists from all over the world are still continuing to study this and are introduced separately as follows. First, the tools of contraception Use tools to prevent sperm, egg contact, or by changing the uterine environment to achieve the purpose of contraception. (I) IUD (IUD) Since its use in our country in 1957, IUD has become the most widely used contraceptive method for women of childbearing age in our country. IUD variety, no fewer than dozens, is still from the shape, size, materials, etc. continue to be improved. Its development can be divided into two stages. The first generation of IUD is an inert IUD, made of stainless steel or plastic with no activity, most of them are ring-shaped, including China’s most widely used metal single ring, gold-plastic hybrid ring, others are twist ring, Birth control flowers, shield type,