The research indicates the major reason of tumor occurrence is abnormal cell apotosis. Anti - cancer drugs were applied by causing apotosis to inhibite and clear tumor cells while normal cells were aslo caused apotosis at the same time. Therefore , enhanced apotosis was the reason of chemical therapy side -effects. This adopted ovario - cancer patients as subjects, formation changes of apotosis cells as basis to detect peripherally white blood cell and analyze the relationship of the decreasing ...