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火車網

孕婦羊膜穿刺多少周做

其他更新時間:2024-06-11 16:49:10

做產前診斷最佳穿刺抽取羊水時間是妊娠16~24周。因此,最晚還是不要超過24周,就是6個月作用。

因為這時胎兒較小,羊水相對較多,胎兒漂在羊水中,周圍有較寬的羊水帶,用針穿刺抽取羊水時,不易刺傷胎兒,抽取20毫升羊水,只占羊水總量的1/20~1/12,不會引起子宮腔驟然變小而流產。

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