Rubina Anwaar.
Ovarian cyst as a cause of chronic pelvic pain - an ultrasound study.
Pak J Med Health Sci Jan ;4(4):423-5.

30 patients with chronic pelvic pain coming to ZMH were selected. On ultrasound examination 2 had cystic mass in ovary. Women normally have two ovaries that store and release eggs. Each ovary is about the size of a walnut, and one ovary is located on each side of the uterus. One ovary produces one egg each month, and this process starts a woman's monthly menstrual cycle. The egg is enclosed in a sac called a follicle. An egg grows inside the ovary until estrogen, signals the uterus to prepare itself for the egg. In turn, the lining of the uterus begins to thicken and prepare for implantation of a fertilized egg resulting in pregnancy. This cycle occurs each month and usually ends when the egg is not fertilized. All contents of the uterus are then expelled if the egg is not fertilized. This is called a menstrual period.

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