Martin Hume Johnson (born 1944) is a British scientist who is emeritus professor of Reproductive Sciences in the Department of Physiology, Development and Neuroscience (PDN) at the University of Cambridge.

[2][1][3] Johnson was educated at Cheltenham Grammar School for Boys and Christ's College, Cambridge, where he was awarded Master of Arts and Doctor of Philosophy degrees in 1969 for immunochemical analysis of factors affecting fertility.

[2][4] Currently, Johnson's research investigates the history of the reproductive and developmental sciences and their historical relationship to the development of human In vitro fertilisation and other clinical technologies, and to their regulation legally and ethically.

[3] Johnson collaborates with Kay Elder, at the Bourn Hall Clinic, Sarah Franklin[5] and Nick Hopwood[6] in the Department of History and Philosophy of Science, University of Cambridge.

He also contributed to our understanding of the timing of zygotic gene activation, optimised protocols for cryopreservation of mouse oocytes, and used transgenic mice to study erythropoietin production with me, and the role of glial cells in brain regeneration after traumatic damage.