Part of a woman's reproductive system, ovaries make the eggs necessary for conceiving a child. The ovaries are attached to the uterus (the womb) by the fallopian tubes. Like other organs in the body, ovaries can become cancerous. Ovarian cancer can be difficult to detect and is often found when it is at a late stage or has already spread (metastasized). Ovarian cancer is the fifth leading cause of cancer death in women aged 35 to 74 years. About 1 to 2 women in 100 get ovarian cancer during their lifetime. Because ovarian cancer is usually found at an advanced stage, the survival rate is lower than for other types of cancer (such as breast cancer) that are easier to detect at an early stage. If ovarian cancer is found early and treated, survival rates improve to more than 90%. The most common type of ovarian cancer is epithelial ovarian cancer, which arises from the surface (epithelium) or perhaps the inner surface of the fallopian tube. Germ cell and stromal tumors of the ovary are rare. The June 8, 2011, issue of JAMA includes an article about screening for ovarian cancer.