1. Ability to check quality of semen before breeding. 2. Positive control of reproductive diseases. 3. Saves time. 4. Eliminate "social" problems of sire or dam. 5. Ability to breed more often. 6. Proven higher conception rates. 7. Proven larger litter sizes. 8. Proven better puppy survival rates. 9. Potentially less return breedings. 10. The best way to breed a virgin bitch without possible harm to sire or dam.