Objective To study the immune function of gynecologic malignant tumor patients with chemotherapy and the influence of cord blood transfusion.Methods Thirty cases of gynecologic malignant tumor patients with chemotherapy and 30 of healthy women were divided into three groups,MTT colorimetry and flow cytometry was used to determine the change of immune function.Results ①The number of CD4 + T cell in patients was lower than that in healthy women and CD8 + was much higher.The ratio of CD4 +/CD8 + was inverted( t=2.56,P