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The initial shipment, in 1665, consisted of two stallions and twenty mares from the Royal Stables in Normandy and Brittany, the centre of French horse breeding.[7] Only 12 of the 20 mares survived the trip. Two more shipments followed, one in 1667 of 14 horses (mostly mares, but with at least one stallion), and one in 1670 of 11 mares and a ...
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.
Thoroughbred is a specific breed of horse, while a "purebred" is a horse (or any other animal) with a defined pedigree recognized by a breed registry. [175] Horse breeds are groups of horses with distinctive characteristics that are transmitted consistently to their offspring, such as conformation , color, performance ability, or disposition.
By breeding mares only at the peak of their estrous cycle, a few thoroughbred stallions have mated with over 200 mares per year. With use of artificial insemination , one stallion could potentially sire thousands of offspring annually, though in practice, economic considerations usually limit the number of foals produced.
Mares are used as dairy animals in some cultures, especially by the nomads and formerly nomadic peoples of Central Asia. Fermented mare's milk, known as kumis, is the national drink of Kyrgyzstan. Some mares, usually of draft horse breeding, are kept in North America for the production of their urine. Pregnant mares' urine is the source of the ...
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"Long day" breeders cycle when days get longer (spring) and are in anestrus in fall and winter. Some animals that are long day breeders include ring-tailed lemurs, horses, hamsters, groundhogs, and mink. "Short day" breeders cycle when the length of daylight shortens (fall) and are in anestrus in spring and summer.
The mare has two ovaries, usually 7 to 8 cm (2.8 to 3.1 in) in length and 3 to 4 cm (1.2 to 1.6 in) thick, that generally tend to decrease in size as the mare ages. In equine ovaries, unlike in humans, the vascular tissue is cortical to follicular tissue, so ovulation can only occur at an ovulation fossa near the infundibulum.
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