title: Influence of photoperiod and ovaries on seasonal reproductive activity in mares.
mesh_terms: D000818:Animals; D002369:Castration; D004971:Estrus; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D006736:Horses / Q000502:physiology*; D008027:Light; D006080:Ovarian Follicle / Q000502:physiology; D010053:Ovary / Q000502:physiology*; D010060:Ovulation; D010507:Periodicity; D011247:Pregnancy; D012621:Seasons
chemical_list: D005640:Follicle Stimulating Hormone