Effect of GnRH-A Treatment at Weaning on Follicular Growth Monitored by Transrectal Ultrasonography in Sows

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  • 離乳時のGnRH-A投与が経直腸超音波検査法でみた種雌豚の卵胞発育に及ぼす影響
  • リニュウジ ノ GnRH A トウヨ ガ ケイチョクチョウ チョウオンパ ケンサホウ デ ミタ シュシブタ ノ ランポウ ハツイク ニ オヨボス エイキョウ
  • リニュウジ ノ GnRH-Aトウヨ ガ ケイチョクチョウチョウオンパケンサホウ デ ミタ シュシトン ノ ランホウ ハツイク ニ オヨボス エイキョウ

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Therapeutic effect of GnRH-A (Buserelin 10 μg) treatment at weaning on follicular growth was monitored by transrectal ultrasonography in sows. After GnRH-A treatment, plasma concentrations of estradiol-17β and IGF-1 have increased, and the diameter of ovulatory follicles has enlarged compared to those in the controls. There was neither difference in the interval to the estrus after weaning nor litter size between GnRH-A treatment and controls. GnRH-A treatment stimulates the ovarian function after weaning and enhances conception rates in sows.

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