title: [Morphological variations of rat mammary glands according to the age and the environmental factors (author's transl)].
abstract: We took the microscopic study of the mammary gland lactation as a test of prolactin (Prl) secretion in female rats. Aging is liable to cause the acini secretion in 7 females out of 17. Constant light or the repetition of stresses which are known to increase the serum Prl concentration have no effect in young females' mammary gland but always cause an abundant lactation in the 18 old females. In this test, aging and environment can be synergistic.
mesh_terms: D000375:Aging; D000818:Animals; D004777:Environment; D005260:Female; D007774:Lactation; D008029:Lighting; D008321:Mammary Glands, Animal / Q000033:anatomy & histology*; D011247:Pregnancy; D011388:Prolactin / Q000097:blood; D051381:Rats
chemical_list: D011388:Prolactin
vernacular_title: Variations morphologiques des glandes mammaires de la ratte en fonction de l'âge et de l'environnement.