Table 1.

Body weight, total body water, body density and total body fat assessed by means of two- and three-component models in healthy women [12] before pregnancy, at gestational weeks 14 and 32 and 2 weeks postpartum ¹.

	Before Pregnancy	Gestational Week 14	Gestational Week 32	2 Weeks Postpartum
Body weight (kg)	66.6 ± 12.8	68.4 ± 13.2	77.3 ± 13.0	71.5 ± 12.8
Total body water (kg)	31.5 ± 4.0	32.5 ± 4.3	38.1 ± 4.4	33.6 ± 4.2
Body density (g/mL)	1.029 ± 0.019	1.027 ± 0.021	1.021 ± 0.018	1.020 ± 0.017
Total body fat (%)
Two-component model	31.4 ± 9.0 2	31.8 ± 10.1 3	32.7 ± 8.8 4	33.8 ± 8.5 5,6
Three-component model 7	33.0 ± 7.9	33.2 ± 7.7	33.1 ± 7.9	35.2 ± 6.8
p for difference 8	0.031	0.16	0.49	0.043

¹ Mean ± SD, n = 17; ² Calculated using Equation (2) and fat-free mass density 1.1 g/mL [6,13]; ³ Calculated using Equation (2) and fat-free mass density 1.099 g/mL [2]; ⁴ Calculated using Equation (2) and fat-free mass density 1.092 g/mL [2]; ⁵ Calculated using Equation (2) and fat-free mass density 1.094 g/mL [5]; ⁶ The corresponding result calculated using Equation (2) and fat-free mass density 1.1 g/mL [6,13] is 35.4% ± 8.3% total body fat, which does not differ significantly from the corresponding value, assessed by means of the three-component model; ⁷ Calculated using Equation (1); ⁸ Student’s t test for paired observations.