回复：请问学医的朋友，B超对胎儿的影响？

来源: MDGG 于 2005-08-15 09:55:53 [] [博客] [旧帖] [给我悄悄话] 阅读数 : 0 (449 bytes)

In general, no.

When dig it deeper, yes.

The B mode part of B超 is believed to be safe. However, for every OB ultrasound, you need M mode to detect/document fetal hear beat. M mode US beam focused on small tissue can elevate tissue temperature, among others. So LONG period M mode on fetal heart should be avoided --- don't be too excited of asking the sonographer to let you listening to your baby's heart beat !!!

Good luck.

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