天气预报 > 其他 > 怀孕29周胎儿体重标准是多少
怀孕29周胎儿体重标准是多少
更新时间: 2020-11-05 00:00:00  

孕妇进入孕29周之后,胎儿的体重大约会维持在1274克左右。胎儿的身体长度保持在36cm上下,双顶径的正常范围值维持在7.5±0.65cm。进入这一时期之后,宝宝的脑部发育进入加速状态,胎动情况减少,胎儿体积增加,类呼吸行为出现,脏器发育持续,听觉系统发育明显,指甲清晰可见。

胎儿,是指妊娠8周以后的胎体。妊娠4~8周娩出的胎体为胚胎。胚胎期重要器官逐渐形成,在胎儿期各器官进一步发育成熟。胎儿在妊娠28周以前娩出的现象称为流产;孕28~37周前娩出的现象称为早产,孕37周至不满42足周娩出的现象称为足月产。妊娠全程共280天即40周。

关键词: 怀孕 胎儿 体重 标准 多少

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