Abnormal testosterone levels in males can cause low libido, erectile dysfunction, decreased muscle mass, and fatigue. Female symptoms include irregular menstrual cycles, reduced sex drive, and vaginal dryness.
Cunningham, G., & Toma, S. (2011). Why is androgen replacement in males controversial? The Journal of Clinical Endocrinology & Metabolism, 96(1), 38-52. https://doi.org/10.1210/jc.2010-1658
