胎盤在胎兒發育的胎盘時候,其實也是熟离生产會有發育的 ,並且還會有分級的多久形式進行判斷胎盤的發育情況。胎盤一級成熟距離生產還得多久呢,胎盘這個問題其實也是熟离生产許多孕婦想要知道的,因為想做好相關的多久準備 。其實一級胎盤在31周左右就可以形成的胎盘,那麽這個時間段距離分娩的熟离生产時間也是很接近的 。
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準媽媽們需要知道,多久一般胎盤的胎盘成熟度到達一級或二級的時候 ,就可以進行生產分娩了。熟离生产正常的多久分娩時間都是在這個時間段,如果胎盤的胎盘成熟度到達三級 ,就說明胎盤已經開始老化了 ,熟离生产如果再不及時分娩,多久就可能會對胎兒造成威脅,對準媽媽也會有不利的影響。
胎盤和我們人體的器官一樣,會有一定的生長期和衰老期 。一般來說 ,胎盤成熟度通常分為4個等級,即0到3級:0級表示胎盤還沒有成熟 ,1級代表胎盤基本成熟 ,2級代表胎盤已經成熟 ,3級則代表胎盤已經衰老 。所以準媽媽們不可以等到3級在去醫院,平時隻要發現異常 ,就應馬上去醫院進行檢查 。
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當胎盤成熟度在0-1級時 ,表明其功能良好 ,1-2級則表明胎盤功能正常 ,但是當到達3級時 ,就表明胎盤功能開始下降了,一旦胎盤功能下降就會影響氧氣和養料的正常運輸,這時胎兒隨時都有可能發生危險 。當胎盤處於0級時,就說明胎盤功能良好,隨著孕期的推移,胎盤會逐漸到達三級 。但萬不可到達三級才去醫院。
所以 ,準媽媽們一般在胎盤成熟的1到2級是,就可以生產了 。準媽媽大可不必害怕自己到三級還沒有分娩,因為如果在1級或2級是,準媽媽到了預產期 ,有很大可能性是會自然分娩的 。所以為了寶寶的健康,避免寶寶在肚子發生危險 ,準媽媽要準時去醫院進行產檢。
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分娩前的征兆
1、孕婦腹部輕鬆感:初孕婦在臨產前1-2周 ,由於胎兒先露出頭部下降進入骨盆 ,子宮底部降低,常感上腹部較前舒適,呼吸較輕快 ,食量增多 。
但由於先露出頭部下降壓迫盆腔膀胱、直腸等組織,常感下腹墜脹,小便頻、腰酸等。
2、假陣縮 。孕婦在分娩前1-2周,常有不規律的子宮收縮 ,與臨產後的宮縮相比有如下特點:持續時間短 、間歇時間長,且不規律 ,宮縮強度不增加 ,宮縮隻引起輕微脹痛且局限於下腹部,宮頸口不隨其擴張,小量鎮靜劑即能抑製這種“假陣縮” 。
3、見紅:在分娩前24-48小時,陰道會流出一些混有血的粘液,即見紅。是由於子宮下段與子宮頸發生擴張 ,附近的胎膜與子宮壁發生分離,毛細血管破裂出血,與子宮頸裏的粘液混合而形成帶血的粘液性分泌物,為臨產前的一個比較可靠的征象。若陰道出血量較多,超過月經量 ,不應認為是分娩先兆 ,而要想到有無妊娠晚期出血性疾病,如前置胎盤 、胎盤早剝等疾病。
4 、子宮底下降 :初產婦到了臨產前兩周左右 ,子宮底會下降 ,這時孕婦會覺得上腹部輕鬆起來 ,呼吸會變得比前一陣子舒暢 ,胃部受壓的不適感覺減輕了許多 ,飯量也會隨之增加一些 。
(责任编辑:休閑)
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