What is adenomyosis?

What is adenomyosis?

Adenomyosis (add-en-o-my-OH-sis) is a condition of the female reproductive system. It causes the uterus to thicken and enlarge.

Endometrial tissue lines the inside of the uterine wall (endometrium). Adenomyosis occurs when this tissue grows into the myometrium, the outer muscular walls of the uterus. This extra tissue can cause the uterus to double or triple in size and lead to abnormal uterine bleeding and painful periods.