Abstract:

To study the relationship between chromosome polymorphism and clinical effect of reproductive abnormalities, we prepared chromosomes from peripheral blood lymphocytes and carried out G/C banding and karyotype analyses. Out of 1 414 cases who came in for genetic counseling, 273 had chromosome abnormalities. Among these 273 cases, 180 cases (65.93%) were karyotype variations, with the remaining 93 cases (34.07%) being non-polymorphic chromosomal abnor-malities. Karyotype variations included 10 cases of satellite increases in the D/G group, 35 cases of secondary constriction increases, 99 cases of big or small Y chromosome, 6 cases of pericentric inversion of chromosome Y and 30 cases of pericentric inversion of chromosome 9. These results indicated that clinical effect such as abortion, sterility, stillbirth and congenital malformation are mainly related to chromosome polymorphisms.