Dr. Yee is Board Certified in both OB/GYN and Reproductive Endocrinology/Infertility. He has been a pioneer in the field of in vitro fertilization since 1982, and his contributions include the first successful frozen embryo transfer resulting in a healthy baby in the United States. He is well known for his expertise in the field of ultrasound. He is also noted as the lead author of Transvaginal Sonography in Infertility. Dr. Yee has served and held numerous leadership positions including president of the Society for Assisted Reproductive Technology (SART), board member of the American Society for Reproductive Medicine (ASRM), and an active deputy commissioner of the College of American Pathologists (CAP) for over twenty years which regulates IVF labs in the United States. In 1996, Dr. Yee co-founded the Pacific Society for Reproductive Medicine and is a permanent member of their Executive Council.