Signs and symptoms of ovarian cancer may include:
Abdominal pressure, fullness, swelling or bloating
Pelvic discomfort or pain
Persistent indigestion, gas or nausea
Changes in bowel habits, such as constipation
Changes in bladder habits, including a frequent need to urinate
Loss of appetite or quickly feeling full
Increased abdominal girth or clothes fitting tighter around your waist
A persistent lack of energy
Low back pain
However, Symptoms of ovarian cancer are not specific to the disease, and they often mimic those of many other more-common conditions, including digestive problems
Also here's some additional info on ovarian cancer.
Three main types of ovarian cancers (tumors)
Epithelial ovarian cancer (epithelial ovarian tumors) - derived from cells on the surface of the ovary. It occurs mainly in adults.
Germ cell ovarian cancer (germ cell ovarian tumors) - derived from the egg-producing cells within the body of the ovary. This rare type of cancer more commonly affects children and teenage girls.
Stromal ovarian cancer (sex cord stromal tumors) - develops within the cells that hold the ovaries together.
Cancers from other organs in the body can spread to the ovaries - metastatic cancers - a metastatic cancer is one that spreads from where it first arose as a primary tumor to other locations in the body.