<prompt> Estrogen therapy for urinary incontinence acts by all mechanisms exceptIncrease collagen deposition thereby increasing urethral coaptation.Increase α - adrenergic receptor sensitivity.Decreases vascularity of periurethral capillary plexus.Increase urethral blood flow and urethral closing pressure.  <response>: Oestrogen administration increases vascularity of periurethral capillary plexus. Especially useful in menopausal women with urinary incontinence. 