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这样避孕 容易失败又影响生育

发布日期:2024-07-17 13:48:48编辑:秩名

这样避孕 失败事小影响生育事大
  避孕是夫妻、情侣间的必备课题,但并不是所以人都知道如何正确避孕。如果避孕方法用错了,不但可能避孕失败,还可能影响日后的生育能力。所以,孕前的男男女女们,避孕这门课必须好好上。
 
 

  ▍体外射精

 
  ——对男性生育的影响
 
  不少人以为,性生活时,只要男性在将有射精感的时候(即射精之前)及时将阴茎从阴道中抽出,将精液射到阴道外面,使精子不能与卵子相遇,就能达到避孕的目的。
 
  精液通常在射精前就已从尿道口流出几滴,每滴内含有众多精子,而这已足以令女人的卵子受精。而且,即将射精和射精是一个连贯的动作,两者之间相隔的时间极短,多数男子难以把握时机,一旦在即将达到性高潮时,不能及时“撤退”,使最初射出的精液排入女性的阴道内,容易导致怀孕。
 
  此外,在即将高潮时抽出需要男性“恰到好处”地掌握“火候”,这使得男性因过分注意射精时间而精神紧张,使性交过程不圆满,久而久之反倒会对以后的备孕生活产生影响:
 
  可诱发射精异常。射精异常包括射精过快和不射精等。通过性交中断强烈地抑制不射精,如果经常这样,会酿成射精障碍,出现两种相反的情况。一种是射精过快,即人们常说的“早泄”;另一种则是射精延迟,轻者出现射精时间延迟、射精不爽快,重者压根儿就不再射精。
 
  可诱发阳痿。性交半途中断,无论大脑皮质的性中枢、各路性活动控制神经以及各个性器官依然处于兴奋状态,不能很快松弛下来,无形中就加重了神经系统与性器官的负担,造成一种“过度疲劳”现象,时间长了就会导致阴茎的勃起功能异常。
 
  可对男女双方的心理造成负面影响。性交在即将射精时半途中断,会导致男女双方性交快感的缺失,心理的不满足,长此以往,必然会对男女双方的心理造成负面影响,严重者甚至影响夫妻关系。
 

  ▍事后吃紧急避孕药

 
  ——对女性生育的影响
 
  紧急避孕药是事后补救的常用“避孕法宝”,很多人侥幸的认为,即使没有做任何保护措施也不要紧,只要在爱爱后72小时之内吃一颗药,就万无一失,于是经常使用此招。
 
  紧急避孕药是激素,在短时间内使宫颈黏液变稠,阻碍精子和卵子结合,能使受精卵难以着床,从而达到避孕目的。
 
 
  但需要强调的是,紧急避孕药只是一种事后补救方法,仅对一次无保护性生活有效,且它的药剂量是常规避孕药的十多倍,采用大剂量的药物来干扰卵巢功能,对女性的卵巢功能、肝肾代谢等系统都会产生一定的危害,虽然现在还没有具体数据和相关研究直接表明紧急避孕失败而妊娠者,新生儿畸形发生率会升高。但可以肯定的是,它会导致女性月经紊乱,这实际上已经间接地影响了以后的正常怀孕。
 

  ▍安全期避孕

 
  ——避孕失败率最高
 
  也就是所谓的“安全期”,即根据女性排卵期和精子、卵子在女性生殖道里存活时间,推算出女性不受孕的一段时期,如“月经期前七天和后八天都是安全期”,称只要选择在安全期里做爱,即使无保护措施也不会中招。
 
  通常来说,有排卵的女性,每个月经周期中围绕排卵前后有9-15天是容易受孕的日子,除此之外的日子相对来说不容易受孕,也就是人们常说的“安全期”。然而,女性排卵的时间会受情绪紧张、环境变化、压力以及健康状态等因素影响,从而出现排卵推迟或提前,并且还有可能发生额外排卵。
 
  因此,所谓的“安全期”并不安全,安全期避孕法的失败率极高。

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