Henao-Gonzalez Mariana, Ferrer María S, Jiménez-Escobar Claudia, Palacio-Baena Luis G, Maldonado-Estrada Juan G
One Health and Veterinary Innovative Research and Development (OHVRI-Group), College of Veterinary Medicine, University of Antioquia, Medellin 050034, Colombia.
Department of Large Animal Medicine, College of Veterinary Medicine, The University of Georgia, Athens, Georgia, USA.
Vet Med Int. 2023 Sep 15;2023:2597332. doi: 10.1155/2023/2597332. eCollection 2023.
Uterine involution, ovarian activity, and incidence of postpartum uterine disease (PUD) were assessed in forty-eight dairy cows from calving until the 10 postpartum week. Postpartum follow-up included evaluation of uterine involution and ovarian structures by B-mode, Doppler color, and Doppler spectral ultrasound of the right uterine artery in cows with no calving or postpartum uterine problems (healthy cows). Data from cows that developed PUD (PUD cows) were compared with healthy cows matched by herd and days in milk (DIM). Data were analyzed by descriptive statistics, simple regression, one-way ANOVA, or repeated ANOVA measures, and in data analysis of healthy cows, uterine horn diameter assessed by B-mode ultrasound ranged from 22.9 ± 2.4 to 19.4 ± 1.4 mm and 19.9 ± 2.2 to 20.5 ± 2.3 mm from the fourth to the seventh postpartum week in the left and right uterine horns, respectively ( > 0.05). During the study, 15 and 7 cows had in the left and right ovaries, respectively. The mean time for the first postpartum CL was 30.1 ± 3.2 DIM (min 8, max 67 DIM). In data analysis of PUD cows, uterine blood flow assessed by color Doppler ranged from 7.4 ± 4.0 to 43.75 ± 10.3% in cows that developed PUD compared to 16.7 ± 11.0% in healthy cows ( > 0.05). No statistically significant changes were found in resistance index, pulsatility index, time-averaged maximum velocity, time-averaged mean velocity, or diastole/systole ratio (D/S) in cows that developed PUD compared to healthy cows ( > 0.05). Finally, no correlation was found between Doppler spectral parameters and uterine involution ( > 0.05). Our data suggest that cows receiving transition diets and exhibiting normal calving undergo a rapid macroscopic uterine involution and ovarian follicular dynamics resumption. Complete ultrasound evaluation provides valuable data for assessing uterine involution in postpartum dairy cows.
对48头奶牛从产犊至产后第10周的子宫复旧、卵巢活动及产后子宫疾病（PUD）发病率进行了评估。产后随访包括对无产犊或产后子宫问题的奶牛（健康奶牛）通过B超、彩色多普勒和右侧子宫动脉的多普勒频谱超声评估子宫复旧和卵巢结构。将发生PUD的奶牛（PUD奶牛）的数据与按畜群和泌乳天数（DIM）匹配的健康奶牛的数据进行比较。数据采用描述性统计、简单回归、单因素方差分析或重复方差分析方法进行分析，在健康奶牛的数据分析中，通过B超评估的子宫角直径在产后第4至第7周，左、右子宫角分别为22.9±2.4至19.4±1.4mm和19.9±2.2至20.5±2.3mm（P>0.05）。在研究期间，分别有15头和7头奶牛左侧和右侧卵巢出现[此处原文缺失相关信息]。首次产后黄体（CL）的平均时间为30.1±3.2 DIM（最短8天，最长67天）。在PUD奶牛的数据分析中，与健康奶牛相比，彩色多普勒评估的子宫血流在发生PUD的奶牛中为7.4±4.0至43.75±10.3%，而健康奶牛为16.7±11.0%（P>0.05）。与健康奶牛相比，发生PUD的奶牛在阻力指数、搏动指数、时间平均最大速度、时间平均平均速度或舒张/收缩比（D/S）方面未发现统计学显著变化（P>0.05）。最后，未发现多普勒频谱参数与子宫复旧之间存在相关性（P>0.05）。我们的数据表明，接受围产期日粮且产犊正常的奶牛经历了快速的宏观子宫复旧和卵巢卵泡动态恢复。完整的超声评估为评估产后奶牛的子宫复旧提供了有价值的数据。
