Jaśkowski Bartłomiej Maria, Bostedt Hartwig, Gehrke Marek, Jaśkowski Jędrzej Maria
Department of Reproduction and Clinic of Farm Animals, Faculty of Veterinary Medicine, Wroclaw University of Environmental and Life Sciences, 50-375 Wrocław, Poland.
Clinic for Obstetrics, Gynecology and Andrology of Large and Small Animals with Veterinary Ambulance, Justus-Liebig-University, 35392 Giessen, Germany.
Animals (Basel). 2021 Jun 7;11(6):1706. doi: 10.3390/ani11061706.
The aim of the study was to conduct an ultrasound analysis of quantitative parameters of the corpus luteum (CL) in recipient heifers on days 6-8 after oestrus, and to compare reproduction potential of both types of CL in those females. Analyses were performed on 300 heifers, synchronized with two injections of cloprostenol. Clinical and ultrasound examinations of ovaries were performed and measurements of the CL were recorded. The blood samples were taken to determine progesterone level. Pregnancy examination was conducted after 6-8 weeks from the ET. Cavitary CL was found in 32.7% heifers In 48.0% of the cavitary CL, its luteal tissue area was reduced by 14.3% compared to the compact CL, while 16.3% of the CL had luteal tissue reduced by more than 33.8%. Progesterone level in blood serum was higher in heifers with the cavitary CL ( < 0.001). Pregnancy rate was higher for females with a cavitary CL (52%) than those with compact ones (33%, < 0.05). The ultrasound assessment of luteal tissue should be included in the evaluation of the functional status of the CL in ET-recipient heifers. The cavitary CL presence may indicate a higher potential of the recipient in maintaining the pregnancy.
本研究的目的是对发情后6 - 8天受体小母牛的黄体（CL）定量参数进行超声分析，并比较这些母牛中两种类型黄体的繁殖潜力。对300头经两次氯前列醇注射同步发情的小母牛进行了分析。对卵巢进行了临床和超声检查，并记录了黄体的测量数据。采集血样以测定孕酮水平。在胚胎移植后6 - 8周进行妊娠检查。在32.7%的小母牛中发现有空腔黄体。在48.0%的空腔黄体中，其黄体组织面积比致密黄体减少了14.3%，而16.3%的黄体黄体组织减少超过33.8%。有空腔黄体的小母牛血清孕酮水平更高（<0.001）。有空腔黄体的母牛妊娠率（52%）高于致密黄体的母牛（33%，<0.05）。黄体组织的超声评估应纳入胚胎移植受体小母牛黄体功能状态的评估中。有空腔黄体可能表明受体维持妊娠的潜力更高。
