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Hormonal changes during reproductive stages in turkey hens [electronic resource].

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Khalil, H.A

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Language: English Summary language: Arabic Description: p.41-48Other title:

التغيرات الهرمونية خلال المراحل التناسلية في إناث الرومي [Added title page title]

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Agricultural research journal, Suez Canal University, 2009 v.9(1) [electronic resource].

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In: Agricultural Research Journal, Suez Canal University 2009 v.9(1)Summary: The present study was undertaken to compare changes in circulating levels of inhibin-B, prolactin, FSH, LH, estradiol-17β, progesterone and testosterone during different reproductive stages of turkey hens. Blood samples were collected during different reproductive stages: at laying, incubating and out of lay. The results revealed that, highly significant differences (P9J.OOI) among hen's states on all serum hormones concentrations were found. The highest levels of inhibin-B and prolactin were observed in broody hens, while the lowest values were observed in laying hens. In contrast, the highest levels of FSH, LH, estradiol-17β, and progesterone and testosterone hormones were found in laying hens, while the lowest values were found in broody hens. Also, the results clearly demonstrated that, negative correlation was found between both inhibin-B and prolactin levels with gonadotropins and steroid hormones concentrations during different reproductive states of turkey hens. In addition, the results suggest that inhibin-B may contribute to the regulation of FSH and LH secretion during the reproductive stages of turkey hens. However, further studies will be needed to investigate the relationship between the rise of inhibin-B and its role during incubation behavior.

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The present study was undertaken to compare changes in circulating levels of inhibin-B, prolactin, FSH, LH, estradiol-17β, progesterone and testosterone during different reproductive stages of turkey hens. Blood samples were collected during different reproductive stages: at laying, incubating and out of lay. The results revealed that, highly significant differences (P9J.OOI) among hen's states on all serum hormones concentrations were found. The highest levels of inhibin-B and prolactin were observed in broody hens, while the lowest values were observed in laying hens. In contrast, the highest levels of FSH, LH, estradiol-17β, and progesterone and testosterone hormones were found in laying hens, while the lowest values were found in broody hens. Also, the results clearly demonstrated that, negative correlation was found between both inhibin-B and prolactin levels with gonadotropins and steroid hormones concentrations during different reproductive states of turkey hens. In addition, the results suggest that inhibin-B may contribute to the regulation of FSH and LH secretion during the reproductive stages of turkey hens. However, further studies will be needed to investigate the relationship between the rise of inhibin-B and its role during incubation behavior.

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