Occurrence of anestrus, estrus, diestrus, and ovulation over a 12-month period in mares.
D000367:Age Factors; D000818:Animals; D001835:Body Weight; D004971:Estrus; D005260:Female; D006736:Horses / Q000502:physiology*; D008297:Male; D000455:Medicago sativa; D006080:Ovarian Follicle / Q000033:anatomy & histology; D010060:Ovulation; D006109:Poaceae; D011247:Pregnancy; D012621:Seasons; D012726:Sexual Behavior, Animal; D013997:Time Factors