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头臀长22毫米是多少周
更新时间: 2020-11-04 00:00:00  

头臀长22毫米是孕周九周,从胎儿头部到臀部的长度,又称为“头臀长”。

妊娠8~11周期间,每个胎儿发育状况还没有太大差异,因此医院往往通过测量CRL来预测预产日。胎儿头臀长度正常值与孕周关系表简易估计法:孕周=头臀长度+6.5,这些只适用于6--12周。

关键词: 毫米 多少

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