development of primary sexual characteristics
The process whose specific outcome is the progression of the primary sexual characteristics over time, from their formation to the mature structures. The primary sexual characteristics are the testes in males and the ovaries in females and they develop in response to sex hormone secretion.
GO:0003006
developmental process involved in reproduction
is_a
GO:0007275
multicellular organism development
part_of
GO:0007548
sex differentiation
part_of