What is the defination of the large intramural fibroids?

In the article:Fibroids: when should they be removed to improve in vitro fertilization success? large intramural fibroids in close proximity to the endometrial cavity warrant removal prior to IVF,so What is the defination of the large intramural fibroids? Uterine fibroids are larger than 4cm in diameter, or otherwise,thank you!

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