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Gestational Length and First Postpartum Ovulation of Criollo Mares on a Stud Farm in Southern Brazil |
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| Authors: | GHZ Winter MIB Rubin FD De La Corte CAM Silva |
| Institution: | aGraduate Program in Veterinary Medicine, Federal University of Santa Maria, Brazil bEMBRYOLAB, Laboratory of Animal Embryology, Department of Large Animal Clinics, Federal University of Santa Maria, Brazil |
| Abstract: | The Criollo horse industry requires more efforts toward a better understanding of breed characteristics and physiology; few studies have been conducted in Criollo horses to fulfill this demand. Toward this aim, 70 Criollo mares (between 3 and 28 years of age) underwent physiologic evaluation of the length of gestation, occurrence of foal heat, and interval to postpartum ovulation. Gestation length in the 70 mares was 335.6 ± 10.5 days, varying from 312 to 364 days. The mean (±SD) interval from parturition to first ovulation of 42 mares that foaled between September and December of 2005 and 2006 was 19.9 ± 14.0 days. Eighty-three percent of the mares had an interval to foal heat ovulation shorter than 20 days (35/42). The mean (±SD) parturition to ovulation interval of these mares was 14.2 ± 3.0 days. |
| Keywords: | Criollo horse Gestation Foal heat Reproduction Physiology |
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