What is intrauterine insemination? It involves injecting processed semen into the uterine cavity using an intrauterine catheter. This is one of the simplest ways of treating infertility. It is indicated in patients with unexplained infertility, in patients with endometriosis, patients where the semen examination shows low count and motility, in patients with pcod . semen is processed by sperm wash technique and this is then injected into the uterine cavity so that a good no of progressively motile sperms are delivered into the uterus.