Endometriosis (pronounced en-doh-mee-tree-OH-sis) is a disease in which tissue that normally grows inside the uterus grows outside the uterus. It is one of the most common gynecological diseases, and its primary symptoms include pain and infertility. The NICHD conducts and supports research to improve understanding of the mechanisms, diagnosis, and treatments of the disorder. This Institute is also pursuing research to understand the relationship between endometriosis and its symptoms of pain and infertility.
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