Morphological Characteristics of the Placenta and Umbilical Cord of Arabian Mares Foaling in the United Arab Emirates |
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| Affiliation: | 1. Sharjah Equine Hospital, Sharjah, United Arab Emirates;2. Al Asayl Racing and Equestrian, Abu Dhabi, United Arab Emirates;1. School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, South Australia, Australia;2. South Australian Research and Development Institute, Turretfield Research Centre, Rosedale, South Australia, Australia;1. Racehorse Hospital, Miho Training Center, Japan Racing Association, Ibaraki, Japan;2. Laboratory of Racing Chemistry, Utsunomiya, Tochigi, Japan;3. Racehorse Hospital, Ritto Training Center, Japan Racing Association, Shiga, Japan;4. Equine Department, Japan Racing Association, Tokyo, Japan;1. College of Health Science, School of Veterinary Medicine, Wollega University, Nekemte, Ethiopia;2. Department of Veterinary Medicine, College of Food and Agriculture, United Arab Emirates University, Al Ain, United Arab Emirates;3. Aklilu Lemma Institute of Pathobiology, Addis Ababa University, Addis Ababa, Ethiopia;4. Department of Clinical Studies, College of Veterinary Medicine and Agriculture, Addis Ababa University, Bishoftu, Ethiopia;1. Programa de Pós-Graduação em Ciência Animal nos Trópicos, Universidade Federal da Bahia (UFBA), Salvador-BA, Brazil;2. Escola de Medicina Veterinária e Zootecnia (ESCMEV), Universidade Federal da Bahia (UFBA), Salvador-BA, Brazil;3. Núcleo de Pesquisa Equina, Universidade Federal Rural de Pernambuco (UFRPE), Recife-PE, Brazil;4. Department of Veterinary Sciences, University of Messina, Messina, Italy;1. Department of Veterinary Medical Sciences, University of Bologna, via Tolara di Sopra 50, 40064, Ozzano Emilia, Bologna, Italy;2. Department for Biomedical and Neuromotor Sciences, University of Bologna, via Irnerio 48, 40126, Bologna, Italy;3. Department of Experimental, Diagnostic and Specialty Medicine, University of Bologna, via Irnerio 48, 40126, Bologna, Italy;4. Health Science and Technologies Interdepartmental Center for Industrial Research (HST-ICIR), University of Bologna, Bologna, Italy;1. Veterinary Departament, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil;2. Professor in Veterinary Department, Universidade Federal de Viçosa, Viçosa, Minas Gerais, Brazil |
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| Abstract: | A total of 127 normal placentas from Arabian mares resident in the United Arab Emirates were examined. The mean linear dimensions of the placenta were, on average, 84% of those previously recorded for the placentas of the Thoroughbred. Significant differences in the size of the allantochorion between primigravid and multiparous mares were seen only in the linear dimensions of the body portion. The pregnant horn was more commonly on the right than left side of the uterus (P = .01; 74/127; 58%). Cord attachment was primarily at the base of the two placental horns (112/127; 88%), with the remainder showing anomalies from this position. The mean (±SEM) total length of the umbilical cords was 62.2 ± 1.2 cm, being composed of the allantoic portion (29.7 ± 0.9 cm) and amniotic portion (32.5 ± 0.6 cm), which averaged 53 ± 0.01% of the total length. The amniotic portion was usually, but not always, longer than the allantoic portion (79/127; 62%). Longer cords were associated with a greater proportion of allantoic length. An enlarged yolk sac remnant (YSR) was present in 16/127 (13%) placentas. Cords with YSRs displayed a significantly longer allantoic portion than those without (P = .02). The total cord length was not correlated with the weight or area of the allantochorion or amnion, any linear measurement of the allantochorion, gestation length, the month of foaling, parity of the dam, or birthweight or sex of the foal. The purpose for which the mare was bred (i.e., racing or showing) influenced the cord length, those of show mares being significantly longer. |
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| Keywords: | Mare Placenta Umbilical cord Arabian horse Allantochorion |
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