Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The ovarian cancer, a malign tumor that affects women worldwide, characterizes a type of cancer that starts and develops in the ovaries, the female reproductive organs. Being the most deadly of the gynaecological cancers, it is the seventh leading cause of cancer death among women around the world. Annually, more than 200,000 women are estimated to develop ovarian cancer and about 100,000 die from the disease worldwide. Learn more about the ovarian cancer, the female reproductive system and the ovarian diseases, as well as the fallopian tube, considered to be a key source of some ovarian cancers, in this book.