英语翻译As chemotherapy and radiation treatments improve,childre

英语翻译As chemotherapy and radiation treatments improve,children with cancer are living longer.The average five-year survival rate for a range of childhood cancers increased from 58 percent to 81 percent between 1975 and 2005,according to statistics from the.National Cancer Institute But although many of these children now survive cancer-free into their reproductive years,their fertility might not.In young women and girls,direct radiation and chemotherapy drugs can stop egg production by the ovaries—meaning that along with the tumor,hopes for pregnancy are often eradicated.