Dr. Crowley pioneered the use of long-acting GnRH analogues in clinical medicine; defined the physiology of GnRH secrtion in men and women; and is now investigating the genes that control human reproduction and underlie reproductive disorders. He has served as the Director of Clinical Research at the MGH frome 1996-2013 and is the Founder and Past Chair of The Clinical Research Forum, a consortium of >50 leading academic health centers focusing on human research.