What is iui; why done; does it work?

Sperm in uterus. Iui is process of putting prepared sperm in the uterine cavity. Used to treat poor mucus, mild male factor, unexplained infertility-ui, single women or lesbians and sometimes when couple cannot have sex themselves. It works but less than natural intercourse in fertile couples. Often we add superovulation. Works best when ui and normal tests. Best wishes.