Urinary incontinence is a humiliating disability and a common problem in gynaecological clinics. In some centres specialised facilities are avail- able for its investigation and treatment but in most hospitals the general gynaecologist has to manage this difficult condition. For both generalist and subspecialist it is timely to summarise advances in our knowledge of normal and abnormal micturition. Since 1973 the Royal College of Obstetrician's and...