Intrauterine insemination (IUI) is a procedure to directly inject sperm into the uterus. Increasing the number of sperm getting to the egg increases the chance of fertilization of the egg.

IUI is a treatment for mild male factor infertility such as low sperm count or a low number of moving sperm. It is often used in combination with controlled ovarian hyperstimulation to treat unexplained infertility.

Learn more about Northwestern Medicine Center for Fertility and Reproductive Medicine here