Mayor Pedro, López-Gatius Fernando, López-Béjar Manel
Department of Animal Health and Anatomy, Faculty of Veterinary, Autonomous University of Barcelona, E-08193 Bellaterra, Spain.
Theriogenology. 2005 Apr 15;63(7):1832-43. doi: 10.1016/j.theriogenology.2004.08.007.
Ultrasound imaging has been used to elucidate certain aspects of the reproductive biology of wild or endangered species. However, to our knowledge, this tool has not been used for reproductive monitoring of the collared peccary (Tayassu tajacu). In this study, real-time ultrasonography was used in 16 collared peccary females to diagnose early pregnancy status and predict gestational age. Based on the detection of an embryo, the earliest pregnancy diagnosis was made on Day 18 after mating, with the mean time needed for diagnosis being 22 days. Overall accuracies on Days 22, 26 and 28 were 56, 93, and 100%, respectively. On Days 26 and 28, all pregnancy and non-pregnancy diagnoses, respectively, were correct. The fetal measurements that best correlated with gestational age were crown-rump-length (CRL) and the length and diameter of the thorax. CRL was considered the most practical measurement because, contrary to thoracic fetometry, it could be determined when the embryo was first detected. Our findings revealed real-time ultrasound scanning to be a very accurate method for early pregnancy diagnosis and prediction of gestational age in the collared peccary.
超声成像已被用于阐明野生或濒危物种生殖生物学的某些方面。然而，据我们所知，该工具尚未用于领西貒（Tayassu tajacu）的生殖监测。在本研究中，对16只成年雌性领西貒使用实时超声检查来诊断早期妊娠状态并预测妊娠年龄。基于胚胎的检测，最早在交配后第18天做出妊娠诊断，诊断所需的平均时间为22天。在第22、26和28天的总体准确率分别为56%、93%和100%。在第26天和第28天，所有妊娠和非妊娠诊断分别都是正确的。与妊娠年龄最相关的胎儿测量指标是头臀长（CRL）以及胸部的长度和直径。CRL被认为是最实用的测量指标，因为与胸部测量法不同，当首次检测到胚胎时就可以确定CRL。我们的研究结果表明，实时超声扫描是一种非常准确的方法，可用于领西貒的早期妊娠诊断和妊娠年龄预测。
