[Ultrastructural study of the cytological changes in the adenohypophysis of the male quail submitted to long daily photoperiods (author's transl)].

The collective data obtained at the ultrastructural level in anterior pituitaries of male Chinese quails submitted to long daily photoperiods, confirm the cytological changes observed earlier in, at least, 2 types of cells of the gland. This cellular types may be the source of avian LH and FSH.