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Accessory corpora lutea formation in pregnant Hokkaido sika deer (Cervus nippon yesoensis) investigated by examination of ovarian dynamics and steroid hormone concentrations

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Title: Accessory corpora lutea formation in pregnant Hokkaido sika deer (Cervus nippon yesoensis) investigated by examination of ovarian dynamics and steroid hormone concentrations
Authors: Yanagawa, Yojiro Browse this author
Matsuura, Yukiko Browse this author →KAKEN DB
Suzuki, Masatsugu Browse this author →KAKEN DB
Saga, Shin-ichi Browse this author
Okuyama, Hideto Browse this author
Fukui, Daisuke Browse this author
Bando, Gen Browse this author
Nagano, Masashi Browse this author →KAKEN DB
Katagiri, Seiji Browse this author →KAKEN DB
Takahashi, Yoshiyuki Browse this author →KAKEN DB
Tsubota, Toshio Browse this author →KAKEN DB
Keywords: Accessory corpus luteum
Estradiol
Follicular wave
Progesterone
Sika deer
Issue Date: Feb-2015
Publisher: 日本繁殖生物学会
Journal Title: Journal of Reproduction and Development
Volume: 61
Issue: 1
Start Page: 61
End Page: 66
Publisher DOI: 10.1262/jrd.2014-076
Abstract: Generally, sika deer conceive a single fetus, but approximately 80% of pregnant females have two corpora lutea (CLs). The function of the accessory CL (ACL) is unknown; moreover, the process of ACL formation is unclear, and understanding this is necessary to know its role. To elucidate the process of ACL formation, the ovarian dynamics of six adult Hokkaido sika deer females were examined ultrasonographically together with peripheral estradiol-17 beta and progesterone concentrations. ACLs formed in three females that conceived at the first estrus of the breeding season, but not in those females that conceived at the second estrus. After copulation, postconception ovulation of the dominant follicle of the first wave is induced by an increase in estradiol-17 beta, which leads to formation of an ACL. A relatively low concentration of progesterone after the first estrus of the breeding season is considered to be responsible for the increase in estradiol-17 beta after copulation.
Type: article
URI: http://hdl.handle.net/2115/59488
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 栁川 洋二郎

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