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怀孕多少周发育完全
更新时间: 2020-11-04 00:00:00  

妊娠满37周至不满42周胎儿出生,称为足月产,这时候的婴儿已经发育完全。胎儿发育全过程孕期可以分为三个阶段:前三个月是胎儿发育的关键时期,细胞正在分裂成一个完整、有形、但尚未成熟的人,中三个月是胎儿生长迅速,每月大约增长5厘米,最终达到有面表表情、会吞咽、有听觉、会踢脚。后期的3个月里,胎儿迅速增重,出生时平均重达3.4千克。

关键词: 怀孕 多少 发育 完全

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