Good heat checking can help optimize the timing of insemination, and can lessen the impact of poor sperm/semen quality and aged semen. Some desirable technologies include the ability to freeze semen, ovulation timing, sexed semen, and single service AI. Intra-uterine insemination (IUI) can be done surgically into the tip of the uterine horns. The advantage to this is the minimal number of sperm required is far, far less than conventional intra-cervical techniques. This is beneficial because it improves the number of doses per boar ejaculate and could make use of frozen/thawed semen. Proper storage, extender, and handling of semen may affect the quality of the sperm. The attributes studied at commercial boar studs include motility, % abnormal cells, and sperm concentration. Errors can result from cold semen disrupting the motility analysis. All of these examinations give an estimate of viable sperm cells per dose at the time of insemination. The ability to freeze semen would be huge for the industry. This would allow producers to back up quality semen in case of an emergency or transport semen across borders without worrying about time. The main problem that exists today is freezing of semen affects the motility and survivability of the sperm. Sexed semen is one of the most desired reproductive technologies. Work is being done to accomplish this, but all such attempts have been unsuccessful.