Goel A, Gupta P, Singh A, Singh K. Endometrial evaluation with methylene blue staining in patients with normal hysteroscopy. Int J Reprod Contracept Obstet Gynecol [Internet]. 2019 Jun. 29 [cited 2025 Nov. 11];8(7):2715-9. Available from: https://www.ijrcog.org/index.php/ijrcog/article/view/6672