PTH and Hypercalcemia: However, the severity of hypercalcemia (mean calcium level, 2.67 mmol/L) and parathormonemia (mean PTH level, 4 pmol/L prepregnancy) was mild and significantly less than the biochemical severity in case series and reports [median calcium level, 3.1 (range, 2.02 to 4.85) mmol/L; median PTH level, 16.7 (range, 3 to 335) pmol/L] [7], and in our own series (median calcium level, 2.89 mmol/L; median PTH level, 15.9 pmol/L).