Light and reproduction in the rat: effects of photoperiod length on albino rats from two different breeders.
D000311:Adrenal Glands / Q000033:anatomy & histology; D000818:Animals; D001835:Body Weight; D004777:Environment; D004971:Estrus; D005260:Female; D008027:Light; D009929:Organ Size; D010053:Ovary / Q000033:anatomy & histology / Q000502:physiology; D010870:Pineal Gland / Q000033:anatomy & histology; D010902:Pituitary Gland / Q000033:anatomy & histology; D011247:Pregnancy; D051381:Rats; D011919:Rats, Inbred Strains; D012098:Reproduction; D013997:Time Factors; D014599:Uterus / Q000033:anatomy & histology