Artificial intrauterine inseminations (IUI) are used in the treatment of some infertile patients. Fresh or frozen semen are washed and prepared under a negative pressure sterile hood. As a result these samples contain washed sperm that are then placed into a sterile catheter and used for intrauterine insemination (IUI). Either donor or partner samples can be used for this process. Inseminations are schedule during the most fertile time during the recipient women’s cycle. Exact timing can be determined using follicular mapping with a trans vaginal ultrasound. LH urine testing and cervical mucous evaluation also help in the optimal timing for an insemination.