EFFECTS OF ESTROUS-CYCLE AND SEASON ON ULTRASONIC UTERINE ANATOMY IN MARES
EFFECTS OF ESTROUS-CYCLE AND SEASON ON ULTRASONIC UTERINE ANATOMY IN MARES
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DOI：
10.1016/0093-691x(85)90053-6
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发表时间：
1985-01-01
期刊：
影响因子：
2.8
通讯作者：
GINTHER, OJ
中科院分区：
文献类型：
--
作者：
HAYES, KEN;PIERSON, RA;GINTHER, OJ
使用线性阵列扫描仪对非繁殖母马在一年中不同时间的子宫超声图像的形态变化进行了表征。子宫被记录为具有发情间期（子宫评分1，子宫内膜皱襞不可见）、动情期（评分3，明显的子宫内膜皱襞）或中间阶段（评分2）的超声形态特征。在实验 1 中，将 23 匹小母马当年第一个排卵期的子宫评分与第二个排卵期的子宫评分进行了比较。与第一次排卵前 (5/23) 相比，更多母马 (P < 0.05) 在今年第二次排卵 (14/23) 之前表现出子宫内膜折叠。第-10天（排卵=第0天）的平均子宫评分较高（P < 0.05），并且第一个排卵期的第-14、-13和-11天往往比第二个排卵期的相应天数更高（P < 0.1）。第一个排卵期的子宫评分在第-5、-4、-3、-2、-1和0天较低（P < 0.05），并且在第-6天趋于较低（P < 0.01）。此外，子宫评分的变化模式与发情行为强度的变化模式平行。在实验 II 中，在 20 匹母马中，5 月至 6 月（而非 9 月至 10 月）排卵间隔期间的子宫评分曲线呈双峰，因为小幅上升 (P < 0.05) 并随后在第 +3 天和 +6 天之间返回到基线。 5月至6月和9月至10月的平均子宫评分在第-7或-8天开始增加，在第-3天达到最大值，在第-2天和第0天之间下降，在第0天后继续下降，并在第+2天达到动情间期的值特征。结果表明，子宫的超声特征可以提供雌激素暴露的即时指标，并且在判断最佳繁殖时间方面可能具有实用价值。
The morphological changes in ultrasound images of the uterus at various times of the year were characterized in nonbred mares, using a linear-array scanner. The uterus was recorded as having an ultrasonic morphology characteristic of diestrus (uterine score 1, endometrial folds not visible), estrus (score 3, distinct endometrial folds), or an intermediate stage (score 2). In Experiment 1, uterine scores for the first ovulatory period of the year were compared to scores for the second period in 23 pony mares. More mares (P < 0.05) showed endometrial folding prior to the second ovulation of the year (14/23) than prior to the first (5/23). Mean uterine scores were higher (P < 0.05) on Day -10 (ovulation = Day 0) and tended to be higher (P < 0.1) on Days -14, -13, and -11 of the first ovulatory period than on the corresponding days of the second period. Uterine scores for the first ovulatory period were lower (P < 0.05) on Days -5, -4, -3, -2, -1, and 0 and tended to be lower (P < 0.01) on Day -6. In addition, the pattern of change in uterine scores paralleled the pattern of change in the intensity of estrous behavior. In Experiment II, in 20 horse mares, the curve for uterine scores during interovulatory intervals in May-June, but not in September-October, was bimodal due to a small rise (P < 0.05) and subsequent return to baseline between Days +3 and +6. The mean uterine scores for both May-June and September-October began to increase on Day -7 or -8, reached maximum on Day -3, declined between Days -2 and 0, continued to decline after Day 0, and reached a value characteristic of diestrus by Day +2. Results indicated that the ultrasonic characteristics of the uterus may provide an instant indicator of estrogen exposure and may have practical value in judging the optimal time to breed.