MENDELNET 2016 MULTIPLE PREGNANCY IN MARES MARIE IMRICHOVA Department of Animal Breeding Mendel University in Brno Zemedelska 1, 613 00 Brno CZECH REPUBLIC
[email protected] Abstract: Mare is in terms of reproduction described as uniparous, it means that she has one foal. More embryos, fetuses or foals represents non – physiological phenomenon and as such it brings a lot of complications. In terms of the etiology is discussed as a predisposing factor mare’s breed, the most common is a higher incidence associated with Thoroughbreds. Although in context of multiple pregnancies often mentioned is mare‘s age. The aim of this study was to evaluate the incidence and results of multiple pregnancy in Thoroughbred and Old Kladruber Horse mares. It was found 323 records of multiple pregnancies in Thoroughbred and 48 in Old Kladruber Horse mares and the result of the multiple pregnancy was in Thoroughbreds in 258 cases twin abortion, in 45 cases parturition of 2 dead foals, 15 records of parturition 1 live and 1 dead foal and in 5 cases it was the parturition of 2 live foals. In Old Kladruber Horse twin abortion was recorded 36 times, in 7 cases 2 dead foals and in 5 cases 2 live foals. Key Words: horse, breeding, reproduction, pregnancy, twins INTRODUCTION The reproduction standard in horse breeding is the fundamental informative factor affecting its success and profitability. One of the factors that can decide about the reproduction outcome is also multiple pregnancy. Multiple pregnancy basically may occur naturally either by spontaneous division of embryos, or by fertilization of two oocytes after multiple ovulation.