Monitoring the level of serum total calcium (Ca) or ionized calcium (iCa++), circulating slopes in the change of Ca or iCa ++, measuring intraoperative or standard intact parathyroid hormone level, and making a new algorithm by combining more than two of these values have all been reported as useful predictors.5 However, these predictors also facilitate the thyroid surgeon, which patient can be discharge early and hospital budget can be saved.9 Our objective was to determine the frequency of postoperative hypocalcaemia undergoing Total thyroidectomy. The gene discussed is PTH; the disease is Hypocalcemia.