In this study, quantitative MRI will be investigated by employing advanced functional metrics for addressing these challenges. Specifically, diffusion-weighted imaging will be assessed, multi-echo T2 mapping, arterial-spin labeling, and spectroscopy. No intravenous contrast will be administered for purposes of this study. It is hypothesized that these techniques will be sensitive to functional and metabolic differences between subsets of azoospermic cases and will improve upon current characterization of patients with this condition. Moreover, it is believed that these techniques will provide complementary information, such that they may be combined in a synergistic fashion for targeted extraction methodologies.