Fig. 1.

Baseline (black) and response (grey) of total plasma calcium (Ca; a), ionized Ca (b), phosphate (P; c), parathyroid hormone (PTH; d), nephrogenic cAMP (NcAMP; e) and 1,25-dihydroxy vitamin D (1,25(OH)₂D; f) to calcium loading in pregnant, lactating and non-pregnant and non-lactating women. Data are presented as mean + SE. Asterisk is used to indicate significant within-group differences compared to baseline as tested with paired t tests. Letters are used to indicate significant between-group differences in baseline values as tested by ANOVA/Scheffé (P ≤ 0.05); N significantly different to non-pregnant and non-lactating women; L significantly different to lactating women. Circumflex accent tendency to be significantly different as tested by ANOVA/Scheffé (P ≤ 0.10); No significant between-group differences in the change of any of these analytes were found