Objective To investigate the relationship between nabnormal child - bearing history and cytogenetics.

目的探讨不良生育史与细胞遗传学的关系.

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Objective To explore the etiology of mental retardation, amenorrhea , abnormal childbearing history and abnormal sexual appearance.

目的为探讨智力低下 、 闭经 、 不良生育史和性征异常的病因.

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Objective : To explore file etiology of mental retardation, amenorrhea, abnormal childbearing history and abnormal sexual appearance.

目的探讨智力障碍 、 闭经 、 不良生育史、异常性征的病因.

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