IUI treatment (Intrauterine Insemination) is usually the first treatments used when trying assisted fertility. It involves directly inserting sperm into a woman’s womb.
It is a technique in which a sample of prepared sperm (either from the male partner or a sperm donor) is introduced directly into the uterus via the cervix at around the time of ovulation.
IUI can be done within a natural menstrual cycle or stimulated with fertility drugs to invigorate the ovaries.
Watch this great animated video on IUI treatment
Further reading on IUI Treatment
IUI (Artificial Insemination) - Wikipedia
IUI Treatment – National Health Service (NHS)