6Verkerk AJ,Pieretii M,Sutcliffe J,et al.Identification of a gene(FMR-1)containing CGG repeat coincident with a breakpoint cluster region exhibiting length variation in fragile X syndrome[J].Cell,1991,65(5):905-914.
7Fu YH,Kuhl DP,Pizzuti A,et al.Variation of the CGG repeat at the fragile X site results in genetic instability,resolution of the Sherman paradox[J].Cell,1991,67(6):1047-1058.
8Castellví-Bel S,Milà M,Soler A,et al.Prenatal diagnosis of fragile X syndrome:(CGG) n expansion and methylation of chorionic villus samples[J].Prenat Diagn,1995,15 (9):801-807.
9Pesso R,Berkenstadt M,Cuck le H,et al.Screening for fragile X syndrome in women of reproductive age[J].Prenat Diagn,2000,20(8):611-614.
10Castellvi-Bel S, Mila M, Soler A, et al. Prenatal diagnosis of fragile X syndrome: (CGG)n expansion and methylation of chorionic villus samples[J]. Prenat Diagn, 1995,15(9) :801-807.