Effect of photoperiod on ovarian function in the vole, Microtus agrestis.
D000367:Age Factors; D000704:Analysis of Variance; D000818:Animals; D004971:Estrus; D005260:Female; D008027:Light; D009929:Organ Size; D010053:Ovary / Q000033:anatomy & histology / Q000502:physiology*; D010507:Periodicity; D011247:Pregnancy; D012377:Rodentia / Q000502:physiology*; D014599:Uterus / Q000033:anatomy & histology; D014621:Vagina / Q000502:physiology