PLOD1 and Infertility: In the infertile females group, VD levels are positively correlated with LH and LH/FSH ratio having a negligible correlation (r = 0.023, p-value = 0.795 and r = 0.012, p-value = 0.889 respectively), while negatively correlated with FSH having a negligible correlation (r = -0.060, p-value = 0.487).