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首页> 外文期刊>Indian Journal of Animal Production and Management >Hyperprolactinaemia: a possible cause of late maturity in buffalo heifers.
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Hyperprolactinaemia: a possible cause of late maturity in buffalo heifers.

机译：高泌乳素血症：水牛小母牛迟熟的可能原因。

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摘要

Blood samples were collected from 8 non-cycling Murrah buffalo heifers, 3 years of age, before and after a single cutaneous injection of bromocryptine (100 ng/kg body weight). Plasma prolactin concentrations before treatment were between 343.42?4.27 and 461.15?19.24 ng/ml and decreased (P<0.01) to 7.95?.33 ng/ml the day after bromocryptine treatment. Plasma progesterone concentrations showed that 7 out of the 8 heifers had phasic progesterone secretion suggesting the presence of functional corpus luteum, however, they were not expressing behavioural signs of oestrus. Mean oestrogen concentrations which were 6.69?.91 pg/ml on the day of bromocryptine injection rose to 13.21?.75 pg/ml on the day after injection. It is suggested that, though theheifers may have been cycling endocrinologically, high prolactin levels interfered with the normal synthesis of oestrogens necessary for expression of behavioural symptoms of heat.
机译：在一次皮肤注射溴隐隐素（100 ng / kg体重）之前和之后，从3岁的8个非循环Murrah水牛小母牛中收集血液样本。治疗前的血浆催乳素浓度在343.42？4.27和461.15？19.24 ng / ml之间，并在溴隐隐治疗后第二天降低（P <0.01）至7.95？.33 ng / ml。血浆孕酮浓度显示，在8个小母牛中，有7个具有阶段性孕激素分泌，表明存在功能性黄体，但它们并未表达发情的行为迹象。溴隐隐注射当天的平均雌激素浓度为6.69？.91 pg / ml，注射后第二天上升至13.21？.75 pg / ml。有人建议，尽管小母牛可能是内分泌循环的，但是高催乳素水平会干扰表达热行为症状所必需的正常雌激素合成。

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