To the Editor, We congratulate Falah-Hassani and colleagues on an intellectually rigorous, comprehensive, and thoughtful review of the structural elements of the pathophysiology of stress urinary incontinence (SUI). The discussion covers the various tissue defects that are evident in incontinent women and mentions the contribution of obstetric trauma and the relevance of age [[1]]. We [[2]] and others [[3]] have demonstrated a correlation between serum testosterone or testosterone analog levels and a decreased likelihood of SUI in women.