超声用于产前检查趋向普遍化、早期化、多次化。目前多数学者认为,超声应用于产科是安全的,但超声产生生物学效应的报道还是时可见到。因此,在超声安全性研究尚难有明确结论下,孕期超声检查要尽可能采用国际上认可的最低剂量原则。 Ultrasound for prenatal examination tends to universalization, early, multiple. At present, most scholars believe that the application of ultrasound in obstetrics is safe, but the biological effects of ultrasound are still seen when the report. Therefore, in the study of ultrasound safety is still difficult to make a clear conclusion, the ultrasound examination during pregnancy as far as possible to adopt the internationally accepted minimum dose principle.