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A mare may be in heat for 4 to 10 days, followed by approximately 14 days in diestrus. Thus, a cycle may be short, totaling approximately 3 weeks. [21] Horses mate in spring and summer; autumn is a transition time, and anestrus occurs during winter.
Anestrus – occurring in the majority of, but not all, mares – prevents the mare from conceiving in the winter months, as that would result in her foaling during the harshest part of the year, a time when it would be most difficult for the foal to survive.
As the days shorten, most mares enter an anestrus period during the winter and thus do not cycle in this period. The reproductive cycle in a mare is controlled by the photoperiod (length of the day), the cycle first triggered when the days begin to lengthen. As the days shorten, the mare returns to the anestrus period when she is not sexually ...
The height of horses is measured at the highest point of the withers, where the neck meets the back. [23] This point is used because it is a stable point of the anatomy, unlike the head or neck, which move up and down in relation to the body of the horse.
These products contain progesterone which will bring on the induction of estrus in ewes (sheep) during seasonal anestrus. Seasonal anestrus is when ewes do not have regular estrous cycles outside the natural breeding season. Historically, vaginal insemination of sheep only produced 40-60% success rates, and was thus called a "shot in the dark ...
Equine ethics is a field of ethical and philosophical inquiry focused on human interactions with horses. It seeks to examine and potentially reform practices that may be deemed unethical, encompassing various aspects such as breeding, care, usage (particularly in sports), and end-of-life considerations.
Arion is mentioned as early as in the Iliad of Homer, where he is described as the "swift horse of Adrastus, that was of heavenly stock." [10] A scholiast on this line of the Iliad explains that Arion was the offspring of Poseidon, who in the form of a horse, mated with Fury (Ἐρινύος) by the fountain Tilphousa in Boeotia.
Endometrosis is more common in mares that have been used irregularly for breeding. [5] Also strict veterinary supervision increases the foaling rates of mares significantly. [5] As endometrosis is a chronic disease the mare will remain unfertile and the foal may be underdeveloped. [4]