A surgical procedure being pioneered by University College London (UCL) urologists is enabling men born with a very small penis to acquire an average-sized, functioning penis which not only allows them to urinate normally, but for many, to enjoy a full sex life for the first time. In a talk to be given on Wednesday 8 December at the European Society for Sexual Medicine conference in London , Dr David Ralph will present the results from recent operations performed at UCL to correct the condition known as micropenis, which is though to affect 0.6 per cent of the population. Whereas the average size of the human penis is around 12.5 cm or 5 inches, a micropenis spans less than 7 cm or just over two inches.