Table 2.

Characteristics of vitamin D metabolic parameters in premenopausal women

	Infertile (n = 39)	Fertile (n = 29)
Age (years)	37 ± 6	39 ± 6
BMI (kg/m2)	27.3 ± 5.4	27.9 ± 2.3
25OHD (ng/mL)	30.3 ± 9.8	28.9 ± 8.7
Albumin (g/dL)	5.2 ± 0.7*	4.6 ± 0.2
DBP (mg/dL)	40.1 ± 12.5*	53.0 ± 24.0
Free 25OHD (pg/mL)	6.3 ± 2.9*	4.3 ± 1.8
Bioavailable 25OHD (ng/mL)	3.0 ± 1.4*	1.8 ± 0.8
Estradiol (pg/mL)	116.0 ± 29.0*	45.3 ± 26.4

Values are mean ± SD. Differs from Fertile women, * P < 0.01

Abbreviations: 25OHD 25-hydroxyvitamin D, DBP vitamin D binding protein