Photoperiodic stimulation of the mare during winter anoestrus.
D000780:Anestrus; D000818:Animals; D002940:Circadian Rhythm; D003624:Darkness; D004971:Estrus; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D006736:Horses / Q000502:physiology*; D008027:Light; D007986:Luteinizing Hormone / Q000097:blood; D008550:Melatonin / Q000097:blood; D010053:Ovary / Q000502:physiology*; D010060:Ovulation; D010507:Periodicity; D011247:Pregnancy; D011388:Prolactin / Q000097:blood; D012621:Seasons
D011388:Prolactin; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D008550:Melatonin