trisomy 21 syndrome

Ultrasound screening for trisomy 21 syndrome at 11-13~ (+ 6) gestational weeks

超声在孕11-13~（+6）周筛查21-三体综合征中的作用

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Advances in study on relationship between maternal deficiency of folic acid and fetal trisomy 21 syndrome

母体叶酸缺乏与胎儿21-三体综合征关系的研究

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analysis of trisomy of chromosome 21 syndrome of 376 cases heredity consultants

广东部分地区376例遗传咨询者染色体21-三体综合征分析

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Application of inter fluorecence in situ hybridization of chromosome 13/ 21 α satellite probe in amniotic cells for prenatal diagnosis trisomy 21 syndrome

染色体13/21α卫星探针用于产前诊断21三体综合征

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ONE CASE OF 'RING-TYPE' TRISOMY 21 SYNDROME: identified by high-resolution G-banding technique

用高分辨G带技术鉴定一例环形21三体综合征

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Objective To explore the diagnosis, prenatal diagnosis and early intervention of trisomy 21 syndrome ( Down syndrome, DS) at cellular, cell-molecular and molecular levels.

目的在细胞、细胞分子和分子水平对21三体综合征（Down syndrome，DS）进行诊断和干预。

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Therefore, maternal deficiency of folic acid in pregnancy can finally cause development of fetal trisomy 21 syndrome by its effect on the methylation of DNA in oocyte during secondary meiotic division.

故妊娠期母体叶酸缺乏可能通过影响DNA甲基化最终导致胎儿21-三体综合征的发生。

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