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首页> 外文期刊>Tropical Animal Health and Production >Effect of progesterone administration during growing phase of first dominant follicle on follicular wave pattern in buffalo heifers
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Effect of progesterone administration during growing phase of first dominant follicle on follicular wave pattern in buffalo heifers

机译：黄体酮给药在水牛后母牛卵泡波纹卵泡波纹阳性阶段生长期间的影响

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In buffaloes, like other domestic mammals, antral follicles develop in a wave-like pattern. Factors predictive of a particular follicular wave pattern are yet to be identified. In this study, we examined the preponderance of 2- versus 3-wave patterns in 46 interovulatory intervals (IOIs) from 36 buffalo heifers, in which a subset of 10 heifers was scanned for 2 consecutive IOIs to record the repeatability of follicular wave pattern. Two-wave pattern was detected in 63.0% and 3-wave follicular pattern in 27.0% IOIs. The dominant follicles (DF) of both wave 1 as well as the ovulatory wave attained a smaller (P < 0.05) maximum diameter in 3-wave cycle as compared to 2-wave cycle. The mean duration of IOI was significantly shorter in 2-wave compared to three-wave cycles (20.5 +/- 0.3 vs. 22.3 +/- 0.2 days; P < 0.05). Out of 10 buffalo heifers, 7 displayed non-alternating patterns and 3 had alternating follicular wave patterns. We also tested the hypothesis that progesterone administration during early IOI results in increased preponderance of 3-wave pattern and heifers inseminated after ovulation of the third wave DF will have greater fertility. Sixteen heifers subjected to progesterone treatment from D0 (day of ovulation) in a decreasing dose until D5 were compared with control heifers (n = 10). Progesterone treatment significantly reduced the maximum diameter of DF of wave 1 (P < 0.001), whereas the mean duration of IOI remained unchanged (P > 0.05) between the two groups. Progesterone administration during early IOI significantly increased the proportion of 3-wave cycles as compared to control (P < 0.05). The hypothesis that progesterone administration during IOI results in increased preponderance of 3-wave pattern was supported. However, no change in fertility was recorded in progesterone-treated heifers (7 pregnant out of 16; 43.8%) as compared to untreated control heifers (4 out of 10 heifers; 40.0%). In summary, progesterone administration in buffalo heifers during the growing phase of wave 1 resulted in greater preponderance of 3-wave follicular patterns, with no significant effect on fertility.
机译：在水牛，如其他家庭哺乳动物，Antral卵泡以波样模式开发。尚未识别特定滤泡波图案的预测因素。在这项研究中，我们检查了来自36次水牛的三个间隔（IOI）的2-与3波模式的优势，其中扫描了10个小型母牛的子集，以便进行2个连续IO，以记录滤泡波图案的可重复性。在27.0％IOI中以63.0％和3波卵泡图案检测到两波纹图案。与2波循环相比，波1的主导卵泡（DF）以及排卵波在3波循环中达到较小（P <0.05）的最大直径。与三波循环相比，2波的IOI平均持续时间显着短（20.5 +/- 0.3与22.3 +/- 0.2天; P <0.05）。出于10个水牛的小母牛，7个显示的非交替模式和3具有交替的滤泡波图案。我们还测试了孕酮给药在早期IOI期间的假设导致在第三波DF的排卵后产生的3波模式的优势增加，并且在第三波DF的排卵中产生更大的生育能力。将孕酮治疗的十六次小母牛在降低剂量中从D0（排卵日）中的孕酮处理直至D5与对照小母牛（n = 10）进行比较。孕酮处理显着降低了波的DF的最大直径（P <0.001），而两组之间的IOI平均持续时间保持不变（P> 0.05）。与对照相比，IOI早期IOI孕酮的孕酮施用显着增加了3波循环的比例（P <0.05）。在IOI期间，孕酮给药的假设导致支持增加3波模式的优势。然而，与未处理的对照小母牛相比，孕酮处理过的小母牛母牛饲料中没有生育的变化（7例妊娠，7.8％）总之，在波浪1的生长阶段期间的水牛大肠母牛中的孕酮给药导致3波形滤泡模式的优势率更高，对生育率没有显着影响。

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