9号染色体臂间倒位是最常见的染色体结构异常之一,人群中的发生率约为1%。大多数的学者认为9号染色体臂间倒位是一种多态现象,携带者并无异常的表型,然而越来越多的研究提示它与一些异常的临床症状如不孕不育、复发性流产有关。临床症状与倒位的片段大小和位置存在一定的关联。 Inversion of chromosome 9 between arms is one of the most common chromosomal structural abnormalities, with an incidence rate of about 1% in the population. Most scholars believe that chromosome 9 internodal inversion is a polymorphism, carriers have no abnormal phenotype, however, more and more studies suggest it with some abnormal clinical symptoms such as infertility, relapse Related to abortion. There is a correlation between the clinical symptoms and the size and location of the inversed fragment.