Ovarian cancer occurs when a tumour forms in one or both of a woman's ovaries. The ovaries are a pair of small organs that produce and release ova, or human eggs. Women usually have two ovaries, one on each side of the uterus, each about the size of an almond. The ovaries also produce important hormones such as oestrogen and progesterone. They are located in the lower abdomen (pelvis), on either side of the womb ( uterus). An egg released by the ovaries travel through the fallopian tubes to the uterus, and during this journey it may or may not be fertilised by the male sperm. There may be no symptoms or symptoms may be non-specific and include:

abdominal bloating
difficulty eating or feeling full quickly
frequent or urgent urination
back, abdominal or pelvic pain
constipation
menstrual irregularities
fatigue
indigestion
pain during sexual intercourse.