Pathways of activation and change of the endocrine function of testes elicited by effect of presence of the female

1.	The presence of a receptive female elicits a maximal rise, governed by the synchronous augmentation of its biosynthesis in the male sex gland, in the level of T in the blood plasma and testes in male mice within 20–40 min. Blood T and its production by the testes become normalized by the 80th minute, whereas normalization of its content in the male sex gland takes place later.
2.	The activating effect of the presence of a receptive female on the blood level of T is achieved with the involvement of luliberin receptors by the transadenohypophyseal pathway, since a luliberin antagonist completely blocks this effect.

Translated from Problemy Éndokrinologii, Vol. 35, No. 6, pp. 63–66, November–December, 1989.