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孕婦懷孕的孕周，你會(huì)計(jì)算嗎？

出處：媽媽育兒網(wǎng) 日期：2016-06-20 11:26:10 編輯：admin

懷孕了，孕周期這個(gè)問題是孕媽經(jīng)常都需要面對(duì)的。只是，對(duì)于初次懷孕的新媽來說，她們心中都有一個(gè)疑問，究竟什么是孕周期，懷孕周到底是怎么計(jì)算的呢？

其實(shí)，整個(gè)孕期10個(gè)月共40個(gè)孕周期（一個(gè)月4周）。而孕周期的計(jì)算方法并不是從沒來月經(jīng)這個(gè)月開始計(jì)算，而是從末次月經(jīng)時(shí)那個(gè)月就開始算的（如果扣除掉上次來月經(jīng)的那一個(gè)月，實(shí)則只有9個(gè)月）。

之所以從末次月經(jīng)的第一天計(jì)算，據(jù)稱這個(gè)時(shí)間比較好記憶，醫(yī)生在計(jì)算孕周時(shí)，通常從末次月經(jīng)的第一天開始計(jì)算，整個(gè)孕期是9個(gè)月零7天，共280天。每7天為一個(gè)孕周，共計(jì)40個(gè)孕周，以28天為一個(gè)孕月，共10個(gè)孕月。

孕婦懷孕的孕周，你會(huì)計(jì)算嗎？

對(duì)于月經(jīng)不準(zhǔn)的孕婦，胎齡常常和實(shí)際停經(jīng)的時(shí)間不一樣，需要結(jié)合B超、陰道檢查、發(fā)現(xiàn)懷孕的時(shí)間、早孕反應(yīng)的時(shí)間、胎動(dòng)的時(shí)間等指標(biāo)來進(jìn)行科學(xué)推斷。

我們還可以通過宮高來判斷孕周。子宮隨著妊娠的進(jìn)展而逐漸增大，宮底高度隨胎兒生長而增大，同時(shí)與羊水量有一定的關(guān)系，根據(jù)手測(cè)子宮底高度及尺測(cè)恥骨上子宮長度，可以判斷孕周數(shù)。

宮底高度因孕婦的臍恥間距離、胎兒發(fā)育情況、羊水量、單胎或多胎等稍有差異。一般情況下，醫(yī)生可通過產(chǎn)前檢查了解胎兒發(fā)育情況，判斷胎兒大小。如果條件允許，孕婦課在家中進(jìn)行測(cè)量。

準(zhǔn)備一把軟尺，早晨起床后排空膀胱，平臥位，測(cè)量恥骨聯(lián)合正中上緣至宮底的高度，對(duì)照子宮高度表判斷子宮的增長是否符合孕周。這樣有助于發(fā)現(xiàn)巨大兒、羊水過多、胎兒宮內(nèi)發(fā)育受限等問題。

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