Serum calcium levels in the human body are primarily regulated by PTH and vitamin D. Since PTH serves as the primary biochemical marker for assessing serum calcium, it has been extensively investigated as a potential risk factor for hypocalcemia after TT (Mazotas et al., 2018; Mo et al., 2020; Privitera et al., 2021). This evidence concerns the gene PTH and Hypocalcemia.