Asra Naweed, Dawood Suleman, and Fouzia Ansari. “A Study of Vitamin D and Thyroid Profile to Evaluate Infertility in Females”. International Journal of Health and Clinical Research, vol. 4, no. 19, Nov. 2021, pp. 285-9, https://ijhcr.com/index.php/ijhcr/article/view/3131.