Uterus fibroids are benign (not malignant) growths of the uterus myometrium. Because smooth muscle cells make up the majority of the uterus, they can expand as the pregnancy progresses and strongly contract after giving birth to facilitate vaginal delivery. Uterine fibroids may form beneath the endometrium (submucosal), myometrium (intramural), or serosa of the uterus (subserosal)....
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