The oestrous cycle of rats at high altitude.
D000531:Altitude; D000818:Animals; D003081:Cold Climate; D004777:Environment; D004971:Estrus; D005260:Female; D000860:Hypoxia / Q000503:physiopathology; D007247:Infertility, Female / Q000209:etiology; D011247:Pregnancy; D051381:Rats; D014626:Vaginal Smears