In this issue of Endocrinology and Metabolism Clinics, guest editors Channa Jayasena and Shalender Bhasin bring their considerable expertise to the topic of Hypogonadism. Provides in-depth reviews on the latest in Hypogonadism.  Presents the latest information on this timely, focused topic under the leadership of experienced editors in the field; Authors synthesize and distill the latest research and practice guidelines to create these timely topic-based reviews.