Endometriosis is a puzzling hormonal and immune system disease in which tissue like that which lines the inside of the uterus (endometrium) grows outside the uterus. It affects girls and women from before a first menstrual period to postmenopause and can cause pain, infertility, and other problems. There are an estimated more than six million girls and women in the United States alone who have endometriosis.

The most common symptoms of endometriosis are pain before and during menstrual periods, pain during or after sexual activity, infertility, … More