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理想的避孕法应具备:①避孕效果可靠,②无副反应,③价格便宜,④不影响性感,⑤停用后不影响妊孕性,⑥妊娠后对胎儿无不良影响。本文阐述了当前较常用和今后有开发可能的避孕法。一、激素类避孕药:可干扰体内生殖激素的水平,从而(抑制排卵)影响宫颈粘液改变,阻止精子的进入,由于宫内膜变化阻碍孕卵着床和卵管的运动,达到避孕效果,常用的有:1.微型片:不含雌激素,而孕激素也比一般的口服避孕片减少到1/10～7/10,成分有炔诺酮、18甲基炔诺酮、炔诺二醇双醋酸酯、炔雌烯醇、醋炔醚(醋氢炔雌醚)等。(美国食品药物管理局)FDA批准的有炔诺酮0.35mg的Micronor(Ortho),Nor-Q-D(Syntex)和含有混旋-18甲基炔诺酮0.075mg的
Ideal contraceptive method should have: ① contraceptive effect is reliable, ② no side effects, ③ cheap, ④ does not affect the sexy, ⑤ disabled after pregnancy does not affect pregnancy, ⑥ no adverse effects on the fetus after pregnancy. This article describes some of the more common and currently available methods of contraception. First, hormonal contraceptives: can interfere with the level of reproductive hormones in the body, which (inhibition of ovulation) affect the changes of cervical mucus to prevent the entry of sperm, as endometrial changes impede the implantation of eggs and ovum movement, to contraceptive effect, Commonly used are: 1. Micro-tablets: no estrogen, and progestin than the average oral contraceptive tablets reduced to 1/10 ~ 7/10, the composition of norethindrone, 18 norgestrel, norethindrone Alcohol diacetate, ethinyl estradiol, acetylene ether (acetylene estradiol) and so on. (US Food and Drug Administration) FDA approved norethindrone 0.35mg Micronor (Ortho), Nor-Q-D (Syntex) and containing 0.075mg of norethindrone-18