2. Endometriosis is a unpreventable condition of unknown cause affecting women of reproductive age. Although the cause of this condition is not well understood, it is believed that the use of tampons may be a causative factor; using tampons for longs periods of time may cause significant accumulation of menstrual blood, enough that it may escape into the pelvic cavity via the fallopian tubes. In a woman's normal menstrual cycle (28 days) a women's inner layer of the uterus (endometrium) grows in preparation of possible pregnancy, if fertilization does not take place this layer will then sheds and leaves the bodyt at the end of the cycle . This menstrual blood contains endometrial tissue and if it escapes into the pelvic cavity endometrial implantation in surrounding tissue may occur. Endometriosis is defined as the abnormal growth of endometrial tissue outside the uterus. This abnormal clusters of endometrial tissue is commonly found in the pelvic cavity but if it enters the blood stream, it can travel anywhere in the body. Women with this condition experience a lot of pain, especially in the days surrounding their period. This is because the hormonal spikes associated with menstruation causes these ectopic cluster to grow and then shed resulting in blood-files cysts (chocolate cysts) in the affected areas. Symptoms in women whoa are pregnant, nursing or post menopausal is alleviated because normal menstrual hormones are halted. Treatment for endometriosis vary case by case. Treatment include hormonal medications for younger women and in severe cases hysterectomy or panhysterectomy may be performed.