Table 1.
Seasonal differences in vitamin D (total) and other biomarkers.
| Overall | 1st Semester | 2nd Semester | t-Test | ||
|---|---|---|---|---|---|
| Origin | Biomarker | Mean ± SD | Mean ± SD | Mean ± SD | p-value |
| Serum | vitamin D total (ng/mL) | 29.7 ± 13.3 | 26.3 ± 13.2 | 34.2 ± 12.6 | 0.0363 |
| AMH (ng/mL) | 3.68 ± 2.58 | 4.52 ± 2.90 | 2.67 ± 1.72 | 0.0165 | |
| FSH (mIU/mL) | 6.87 ± 1.74 | 6.61 ± 1.79 | 7.25 ± 1.66 | 0.2476 | |
| LH (mIU/mL) | 6.12 ± 2.16 | 6.25 ± 1.74 | 5.94 ± 2.66 | 0.6611 | |
| estradiol (pg/mL) | 1269 ± 754 | 1447 ± 662 | 1076 ± 814 | 0.0957 | |
| Follicular Fluid | AMH (ng/mL) | 3.01 ± 1.90 | 3.49 ± 2.14 | 2.55 ± 1.62 | 0.0848 |
| FSH (mIU/mL) | 4.75 ± 2.04 | 4.34 ± 1.73 | 4.87 ± 2.03 | 0.3255 | |
| LH (mIU/mL) | 0.81 ± 0.82 | 0.74 ± 0.66 | 0.77 ± 0.90 | 0.9174 | |
| estradiol (µg/mL) | 542 ± 419 | 492 ± 346 | 568 ± 496 | 0.5344 |
AMH- anti-Müllerian hormone, FSH- follicle stimulating hormone, LH- luteinizing hormone, SD- standard deviation.