Kaur N, Malla VG, Gupta S. Serum estradiol level and postmenopausal symptoms in surgical and natural menopause. Int J Reprod Contracept Obstet Gynecol [Internet]. 2017 Aug. 28 [cited 2025 Oct. 2];6(9):3920-3. Available from: https://www.ijrcog.org/index.php/ijrcog/article/view/3243