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孕七周crl多少
更新时间: 2020-11-04 00:00:00  

孕七周crl在4.0-6.8厘米左右,但是如果月经不规律,那么排卵也就不规律,crl是会有一定误差的。crl主要是经过B超来检查胎儿从头顶到臀部的长度,经过这种检查能够更准确的推算出胎儿的准确胎龄,也能够很及时的发现胎儿发育是否正常是否健康。

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