gonad development
http://purl.obolibrary.org/obo/GO_0008406
The process whose specific outcome is the progression of the gonad over time, from its formation to the mature structure. The gonad is an animal organ that produces gametes; in some species it also produces hormones. [ http://openisbn.com/search.php?q=0198506732&isbn=1/ GOC:ems ]
Synonyms: gonadogenesis