NR4A1 and adenomyosis: The remaining 50 studies underwent full-text review, and 39 studies were subsequently excluded due to not directly comparing adenomyosis lesions and eutopic endometrium (n = 21), having no measurement of hormone receptor expression (n = 7), participants receiving hormonal treatment (n = 1), or being a review article or abstract only available (n = 7) or because we were not able to translate it into English language (n = 3).