Claus Yding Andersen is Scientific Director of Laboratory of Reproductive Biology, University Hospital of Copenhagen, Denmark and Professor of Human Reproductive Physiology within the Faculty of Health and Medical Sciences at the University of Copenhagen.  He is educated as MSc (1979) and DMSc (1997).

Professor Andersen was a member of the team that introduced IVF to Denmark in the mid-1980s, is senior accredited ESHRE embryologist and have worked as a consultant in more 10 fertility clinics nationally and internationally. During the last twenty years he has headed a national program of cryopreservation of human ovarian and testicular tissue. He is considered one of the pioneers in this field and continue to expand the indications for the use of ovarian tissue cryopreservation in different clinical settings. 

Professor Andersen's major research contributions have been in ovarian endocrinology, oocyte maturation, cryopreservation of gonadal tissue, human embryonic stem cells and development of new principles for ovarian stimulation including the introduction of the agonist trigger and novel approaches to luteal phase support.

He has published more than 300 peer-reviewed scientific papers. He is a much-requested international lecturer and is currently giving around 30 international lectures annually. His current H-index is 65 with more than 14.000 citations. His is currently chief editor on the Reproduction section in Frontiers in Endocrinology.