Kaur, Navdeep, Veena G. Malla, and Sonal Gupta. “Serum Estradiol Level and Postmenopausal Symptoms in Surgical and Natural Menopause”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 6, no. 9 (August 28, 2017): 3920–3923. Accessed October 2, 2025. https://www.ijrcog.org/index.php/ijrcog/article/view/3243.