Objective:To investigate the changes of T lymphocytes sub-types in unexplained recurrent spontaneous abortion(URSA) women before and after active immunotherapy.Methods:Flow cytometry was used to measure T lymphocytes sub-types of 32 URSA women before and after active immunotherapy and 30 normal early pregnant women were taken as control.Results:Compared with control group,CD4+ cells and CD4+/CD8+ ratio increased significantly in URSA women,but CD8+ cells decreased significantly,there were no significant cha...