title: [Differences in the rate of establishment of permanent estrus in rats after autotransplantation of the ovaries and as affected by other conditions].
abstract: In adult female rats, constant light leads to the cessation of the sexual cycle and formation of permanent estrus after 6 to 7 days. In young animals, the sexual cycle was retained despite constant light and only after 3 months when the body weight of the rats reached 200-220 g the estrus became permanent. This happened earlier than in animals with the ovaries autotransplanted to the ears. The combination of constant light and autotransplantation of the ovaries caused an earlier formation of permanent estrus. It is marked that the same mechanism (the age-associated decrease of the cyclic center sensitivity to estrogen) underlies permanent estrus of various etiology.
mesh_terms: D000375:Aging; D000818:Animals; D004971:Estrus; D005260:Female; D008027:Light; D010053:Ovary / Q000637:transplantation*; D051381:Rats; D013997:Time Factors; D014182:Transplantation, Autologous
vernacular_title: Razlichiia v skorosti ustanovleniia postoiannogo éstrusa u krys pri autotransplantatsii iachnikov i nekotorykh vozdeĭstviiakh.