Extra-Corporeal Shockwave Therapy (ESWT) is a new non-invasive treatment that can be used for some types of erectile dysfunctions that are vasculogenic (i.e. caused by poor blood flow). A probe is positioned over different areas of the penis to deliver low-intensity shockwaves, which stimulate the growth of new blood vessels, allowing more spontaneous and harder erections. Each treatment session usually takes about 30 minutes. Six to 12 sessions, usually once a week, may be required to see a response.