Effect of Additional Progesterone Treatment During Intravaginal Progesterone Priming in AnestrousEwes
نویسندگان
چکیده
Oestrus induction with intravaginal progesterone is the most preferred method in anoestrus sheep. In previous studies it was argued that decrease level before sponge removed reduces efficiency. This study aimed to test hypothesis additional treatment during priming anestrous ewes could increase reproductive efficiency of induction. The conducted on 261 Kangal sheep, which were pregnant autumn and gave birth spring breastfed their lambs for about 60-75 days. All animals included randomly divided into 3 different groups as P-7 (n = 86), P-8 80) control 95). At beginning a impregnated placed all (Day 0). During treatment, an injection given group 7 8 days after placed, respectively. As group, no treatment. received 500 IU mare serum gonadotropin at withdrawal. Ram introduced 10th study. There difference between terms estrus rate (P 0.28), pregnancy 0.32) multiple rates 0.38) 0.28). We considered main reason unexpected low concentration end might be result high feed intake metabolic rate. On other hand, this dose caused by excessive levels parameters. Additional support progesteronebased synchronization yielded acceptable results. However, can administered form earlier or insertion obtain better
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Control of estrus and progesterone levels in heifers given intravaginal progesterone coils and injections of progesterone and estrogen.
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ژورنال
عنوان ژورنال: Medycyna Weterynaryjna
سال: 2023
ISSN: ['0025-8628']
DOI: https://doi.org/10.21521/mw.6768