2Simoni G, Brambati B, Danesino C, et al. Efficient direct chromosome analysis and enzyme determenation :from chorionic villi samples in the first trimester of pregnancy. Hum Genet,1983:63:349.
3Tharapel AT, Dacus JV, Tharapel SA, et al, First trimester chorionic villi sampling and direct chromosome prepartions.Clin Genet, 1986: 29 : 502.
4Therman E. Methods in human cytogenetics. In : Therman,E Susman M, eds. Human Chromosomes. 3rd ed. New York:Springer - Verlag, 1993:33 -46.
5Bhatia R, Koppitch FC, Sokol RJ, et al. Improving the yield of direct chorionic villus slide preparations. Am J Obstet Gynecol, 1986: 154:408.
2Simoni G,Brambati B,Danesino C,et al.Efficient direct chromosome analyses and enzyme determinations from chorionic villi samples in the first trimester of pregnancy[J].Hum Genet,1983,63(4):349-357.
4Bomstein E, Lenchner E, Donnenfeld A, et al. Advancedmaternal age as a sole indication for genetic amniocente-sis ;risk-benefit analysis based on a large database reflec-ting the current common practice [J]. J Perinal Med,2009,37(2):99-102.
5Grati FG,Grimi B, Frascoli G, et al. Confirmation of mo-saicism and uniparental disomy in amniocytes,after detec-tion of mosaic chromosome abnormalities in chorionic villi[J]. Eur J Hum Genet,2006,14(3) :282-288.
6Knebel S,Pasantes JJ,Thi DA, et al. Heterogeneity ofpericentric inversions of the human Y chromosome [J].Gytogenet Genome Res,2011 >132(4) :219-226.
7Keify F, zhiyan N, Mirzaei F,et al. Two novel familialbalanced translocations t(8; 11) (p23; q21) and t(6; 16)(q26;pl2) implicated in recurrent spontaneous abortion[J]. Arch Iran Med,2012,15(4) :249-252.
