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唐氏综合征(DS)又称21三体综合征,其主要特征为严重的先天智力障碍,特殊面容,并常伴有各种先天畸形。神经管缺陷(nerual tube defect,NTD)通常是指在中枢神经系统发生的先天缺陷,如颅脊柱裂,整个神经系统暴露在外;此外还有无脑畸形、脊髓脊膜膨出、脑膨出等。这些先天缺陷疾病目前尚没有有效的治疗方法,也是临床上导致流产、死胎、围生儿死亡的主要原因之一。唯一有效的方法是通
Down Syndrome (DS), also known as trisomy 21, the main features of severe mental retardation, special face, and often accompanied by a variety of congenital malformations. Nerual tube defect (NTD) usually refers to the birth defects in the central nervous system, such as craniospasm, the entire nervous system exposed; in addition there are no brain deformity, spinal meningitis, encephalocele . At present, there is no effective treatment for these diseases with congenital defects, and it is also one of the main causes of the death of miscarriage, stillbirth and perinatal disease clinically. The only effective way is through