John Aitken is the highest ranked expert on sperm biology and fertilization in the world (Expertscape). In 2019 the Australian magazine named him as Australia's leading reproductive biologist while a recent ranking of the world's leading scientists by Stanford University ranked him in the top 5 in Obstetrics and Reproductive Medicine. He has won several major awards in reproductive science including the Carl G Hartman Award from the Society for the Study of Reproduction (USA) and the Distinguished Andrologist Award from the American Society of Andrology. In 2012 he was named as NSW Scientist -of-the-Year.
