Conclusion: The ultrasonographic measurement data of nt have an important reference value in prenatal screening of fetal 21-trisomysyndrome.
结论:超声测量胎儿nt值,对2 1 -三体胎儿的筛查有重要的参考价值。
2
Materials and Methods: Cerebral ct findings in 23 cases with 21trisomysyndrome, proved by cytogenetics, were retrospectively analyzed.
材料与方法:回顾性分析23例经细胞遗传学检查证实的21三体综合征的脑部ct表现。
3
Objective: a few trisomy21 cells in normal chromosome karyotype was been observed for study of the correlation of clinical phenotype and development damage in sick children of Down's syndrome.