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胎盘低一般多少周生

更新时间: 2020-11-04 00:00:00     

胎盘低一般在怀孕37周到38周左右的时间生孩子。胎盘(placenta)是后兽类和真兽类哺乳动物妊娠期间由胚胎的胚膜和母体子宫内膜联合长成的母子间交换物质的过渡性器官。胎儿在子宫中发育,依靠胎盘从母体取得营养,而双方保持相当的独立性。胎盘还产生多种维持妊娠的激素,是一个重要的内分泌器官。

关键词: 胎盘 一般 多少

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