title: [Gradual changes of the ovarian structure in persistent estrus produced by continuous illumination in rats].
mesh_terms: D000818:Animals; D004971:Estrus; D005260:Female; D008027:Light; D009929:Organ Size; D010053:Ovary / Q000033:anatomy & histology*; D011247:Pregnancy; D051381:Rats; D013997:Time Factors