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安全期避孕的方法 最安全的“純天然”避孕套(2)

出處：媽媽育兒網(wǎng) 日期：2016-03-12 16:30:56 編輯：admin

安全期避孕的“前七后八”

“前七后八”是安全期避孕中常見(jiàn)推算安全期的一種方式，但是一些女性因?yàn)?對(duì)“前七后八”錯(cuò)誤的理解而導(dǎo)致避孕失敗。安全期，顧名思義，多數(shù)的人都會(huì)認(rèn)為在這個(gè)時(shí)間段根本就不用太在意避孕。其實(shí)這是非常錯(cuò)誤的，跟蛋定哥一起看看專(zhuān)家是怎么說(shuō)的吧！

在這里對(duì)前七后八做一個(gè)簡(jiǎn)單的闡述：

前七：

這個(gè)很好理解，就是來(lái)月經(jīng)前的七天，這時(shí)為相對(duì)比較安全的后安全期，這個(gè)基本上沒(méi)有人會(huì)理解錯(cuò)誤。

安全期避孕的方法 最安全的“純天然”避孕套

后八：

是指從來(lái)月經(jīng)來(lái)潮的第一天開(kāi)始算起之后的八天，不是月經(jīng)結(jié)束后開(kāi)始算起。假如某個(gè)女性從12月01日開(kāi)始來(lái)月經(jīng)，12月06日結(jié)束。

那么“后八”是指12月01日-12月08日的八天，而不是從月經(jīng)結(jié)束以后開(kāi)始起算的12月07日-12月14日這八天。其實(shí)這位女性排除了來(lái)月經(jīng)的幾天，真正屬于前安全期的其實(shí)只有12月07和08兩天。

如果女性的月經(jīng)周期少于26天，一般來(lái)說(shuō)，仍然可以推算“前七”為安全期，而“后八”則不適用。安全期避孕因?yàn)槭艿角榫w、氣候、環(huán)境等因素的影響，可能出現(xiàn)排卵提前、推后甚至額外排卵，因此安全期避孕顯得不那么絕對(duì)安全，因此不建議廣大女性單獨(dú)使用安全期避孕。

安全期避孕真的安全嗎？

安全期避孕是許多夫妻和情侶樂(lè)于采用的一種方式，好處是簡(jiǎn)單、直接、低成本；最突出的壞處是高風(fēng)險(xiǎn)，曾有統(tǒng)計(jì)數(shù)據(jù)表明安全期的避孕有效率約為83%。乍一看還不錯(cuò)，但與避孕套、陰道隔膜、節(jié)育環(huán)等接近98%、99%的有效率來(lái)說(shuō)還相去甚遠(yuǎn)，難怪有人說(shuō)“安全期不安全”。

各有各的安全期

安全期避孕是許多夫妻和情侶樂(lè)于采用的一種方式，好處是簡(jiǎn)單、直接、低成本，最突出的壞處是高風(fēng)險(xiǎn)，曾有統(tǒng)計(jì)數(shù)據(jù)表明安全期的有效率約為83%。乍一看還不錯(cuò)，但與避孕套、陰道隔膜、節(jié)育環(huán)等接近98%、99%的有效率來(lái)說(shuō)還相去甚遠(yuǎn)，難怪有人說(shuō)“安全期不安全”。

按道理說(shuō)，安全期就是不具備受精條件的日子，因此在安全期做愛(ài)應(yīng)該是安全的，但很多人都吃過(guò)“安全期”的虧，問(wèn)題的關(guān)鍵出在安全期的計(jì)算上。

每一位成年女性都有自己的月經(jīng)周期，沒(méi)有兩個(gè)人是完全相同的，因此每個(gè)人都有自己的安全期，無(wú)論是“前七后八”還是“前三后四”都不適合所有人。

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