Ovarian cancer is the seventh most common form of cancer in women in the United States. According to the American Cancer Society, approximately 21,990 new cases of ovarian cancer were diagnosed in 2011, and an average of 15,460 women in the United States will die from ovarian cancer. Learning about ovarian cancer, its symptoms, and treatments, can help women get an early diagnosis.Is there a way to prevent ovarian cancer?At this time, there is no way to prevent ovarian cancer from forming. There are several things that a women can do to lower her risk of developing the condition. Taking oral contraceptives can reduce the risk of developing ovarian cancer by nearly 50 percent if taken for at least 5 years. Pregnancy and breast-feeding also reduces the risk. Other factors that reduce the risk of ovarian cancer include tubal ligation, hysterectomy, and prophylactic oophorectomy (removal of the ovaries).Does ovarian cancer show symptoms during its early stages?Symptoms of ovarian cancer can be hard to distinguish from other conditions, and can commonly mimic non-gynecologic conditions. Many women have stated that they had symptoms from their ovarian cancer, even in the earlier stages. These symptoms included: abdominal discomfort or bloating, pelvic pain, urgent need to urinate, persistent gas, nausea, indigestion, unexplained weight loss or gain or changes in bowel habits, loss of appetite, feeling full during or quickly after a meal, lack of energy, pain during intercourse, shortness of breath, or lower Back pain.Who is at risk for ovarian cancer?The exact cause of ovarian cancer is not certain, but studies have shown several factors that may increase a woman's chance of developing the condition. Woman with a family history of ovarian cancer, especially among first-degree relatives, have an increased risk. Ovarian cancer also increases its risk as the woman becomes older. Most cases occur in women over the age of 50. Women who have never had children are more likely to develop ovarian cancer. Those who use fertility drugs or have had hormone replacement therapy are also at risk, although this is somewhat controversial.