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尽管出生前广泛的超声波检查的研究已有报道,但迄今尚未见到反复的超声波检查暴露对儿童期后果影响的随机对照实验资料的相关描述。此前进行的一项以评估超声
Although a wide range of sonographic studies prior to birth have been reported, no relevant description of randomized controlled experimental data on the effects of repeated sonographic exposures on childhood outcomes has been reported so far. One of the previous performed to evaluate ultrasound