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怀孕期间一共多少周

更新时间: 2020-11-04 00:00:00     

怀孕期间一共40周,一共是280天,以四周为一个孕龄,怀孕四周末可辨认胚胎与体蒂。

怀孕八周末,胚胎初具人形。怀孕12周末肠管已有蠕动,四肢可活动。怀孕16周末部分产妇已能自觉胎动。怀孕20周末胎儿已经有吞咽功能和排尿功能。怀孕24周末出现睫毛和眉毛。怀孕28周末可以有呼吸运动。怀孕32周末皮肤深红,出生可存活。怀孕36周末出生后能啼哭,生活力良好。怀孕40周末出生哭声响亮,吸允能力强。

关键词: 怀孕 期间 一共 多少

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