Adequate, well-controlled studies in pregnant women have not shown an increased risk of fetal abnormalities.
对妊娠妇女群体进行了充分、严格的对照研究，没有发现胎儿畸形的危险性增加。
Conclusion: Ultrasound in the diagnosis of fetal abnormalities in the nervous system has important clinical value.
结论：超声在诊断胎儿神经系统发育异常中具有重要的临床价值。
NT thickening is related to chromosomal syndromes closely, still to congenital heart disease, fetal abnormalities, anemia, infection factors.
NT增厚除了与染色体病密切相关外，还与先天性心脏病、胎儿畸形、贫血、感染等因素相关。
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