ウシ胎子卵巣における前胞状卵胞の発育と血中ホルモン濃度の動態
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概要
- 論文の詳細を見る
The present study aimed to determine the relationship among changes in the number of primordial and primary follicles, ovarian weight and concentrations of androstenedione (A), estradiol-17 β (E2), progesterone (P4), follicle-stimulating hormone (FSH) and luteinizing hormone (LH) in the bovine fetus between day-90 and -150 of gestation. Fetal ovaries were obtained from 25 pregnant cows. Histological sections of the ovaries were examined to determine the number of preantral follicles. The hormone concentrations were determined by enzyme immunoassay. Ovarian weight increased in parallel with fetal age. No clear changes in the number of primordial follicles were observed in this period. Primary follicles were observed in ovarian sections at day-100 and the number of primary follicles increased in parallel with fetal age between day-90 and -120, and afterwards it significantly increased (p<0.05) at day-130. Around day-120, the number of primary follicles increased with the serum concentrations of A and E2. However, no relationships among number of primary follicles and concentrations of FSH and LH were observed in this period. These results indicate that the number of primary follicles markedly increases around day-130 of gestation, the increase in the number of primary follicles is associated with an increase in the concentrations of A and E2 in the fetal serum, and the growth and differentiation of primordial and primary follicles are independent of FSH and LH.
- 日本繁殖生物学会の論文
著者
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ACOSTA Tomas
Laboratory of Reproductive Endocrinology, Graduate School of Natural Science and Technology, Okayama
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Acosta Tomas
Laboratory Of Reproductive Endocrinology Graduate School Of Natural Science And Technology Okayama U
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宮本 明夫
帯広畜産大学・畜産科学科・生殖科学研究室
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宮本 明夫
東広畜産大学大学院畜産衛生学専攻
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FUKUI Yutaka
Laboratory of Animal Reproduction, Obihiro University of Agriculture and Veterinary Medicine
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Fukui Yutaka
Laboratory Of Animal Reproduction Obihiro University Of Agriculture And Veterinary Medicine
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MIYAMOTO AKIO
Laboratory of Animal Genetics and Reproduction, Department of Animal Science, Obihiro University of
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村西 由紀
Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Med
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宮本 明夫
Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Med
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村西 由紀
帯広畜産大学・家畜育種増殖学講座
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MURANISHI Yuki
Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Med
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Miyamoto Akio
Laboratory Of Animal Genefics And Reproduction Obihiro University Of Agriculture And Veterinary Medi
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Fukui Yutaka
Laboratory Of Animal Genefics And Reproduction Obihiro University Of Agriculture And Veterinary Medi
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ACOSTA Tomas
Laboratory of Animal Genetics and Reproduction, Obihiro University of Agriculture and Veterinary Medicine
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