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yun tu zhi yu zai san jiu
Author(s): 
Pages: 87-88
Year: Issue:  2
Journal: Family & Child Care

Abstract: 孕吐9常识 1.孕早期的主要生理变化是:随着胚胎的逐渐形成和子宫的增大,孕妈咪体内的激素水平明显变化,约有半数的女性在停经6周左右出现孕吐. 2.由于体内激素的作用,胃肠平滑肌的张力降低,活动减弱,导致食物在胃内停留过久,孕妈咪常在清晨起床后或饭后除呕吐,还会发生恶心、食欲缺乏的现象,即早孕反应.
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