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一、阴道内避孕法:是很早以前就使用的避孕法,是某种药物或器具放入阴道内阻止精子进入子宫的方法,近些年来重新引起人们的重视。优点是副作用少,妇科并发症少,用药时间短;缺点有避孕失败率高,需做性交前的准备及可有局部刺激与过敏表现。现在本法包括杀精子剂、子宫帽、宫颈帽和避孕海绵等。1.杀精子剂:目前应用的有NP-9,OP-9,TS-88,都是表面活性剂,可破坏精子的细胞膜,一次用量60～100mg,随剂型而异。用法:性交前把药剂尽量放到阴道深处,使之覆盖宫颈,5～15分钟(药膜可延至15～30分钟)药物在阴道内溶解而发挥杀精作用。药效持续1～2小时。新型杀精子剂有顶体酶抑制剂A-ger53,欧洲
First, the intravaginal method of contraception: is a long time ago the method of contraception, is a drug or utensil into the vagina to prevent sperm into the uterus, in recent years to re-attract people’s attention. Advantages are fewer side effects, fewer gynecological complications, medication time is short; disadvantages of contraceptive failure rate, the need to do before the preparation and may have local irritation and allergy performance. This law now includes spermicide, uterine caps, cervical caps and contraceptive sponges. 1. Spermicide agents: Currently used NP-9, OP-9, TS-88, are surfactants that can damage the cell membrane of sperm, an amount of 60 ~ 100mg, with the dosage varies. Usage: As far as possible before the drug into the vagina vaginal depth, so that cover the cervix, 5 to 15 minutes (film can be extended to 15 to 30 minutes) Drugs in the vagina to dissolve and play a spermicidal effect. Efficacy for 1 to 2 hours. New spermicide with acrosin inhibitor A-ger53, Europe