After taking 13 years to finish his post-high school education, he was selected to study embryonic transfer technology at Cambridge University.
他今年卅七歲，在沙田村長大，因為家裡經濟情況不好，求學過程很不順利，從農校、文化大學畜牧系到台大研究所，前後念了十六年。好不容易從研究所畢業，鄭登貴在台灣省畜產研究所作豬的人工受精研究。