Embolisation is a minimally invasive process of causing an organ or tumour to reduce in size by blocking its blood supply. This can be achieved using a number of different materials such as small foam particles, metal coils, glue or, as in the case of fibroid embolisation, polyvinyl alcohol (PVA) particles specially designed for the purpose. Interventional radiologists performing the procedure have years of experience of embolisation in other parts of the body for problems such as cancerous growths or to stop bleeding following trauma or childbirth. Uterine fibroid embolisation applies these skills and techniques in the context of uterine fibroids.