Cloprostenol inouced luteal regression in the beef cow. I. Ovarian response and endocrine changes.

Cloprostenol inouced luteal regression in the beef cow. I. Ovarian response and endocrine changes. Research Abstract Details 

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Cloprostenol inouced luteal regression in the beef cow. I. Ovarian response and endocrine changes. Abstract Text:

L M Harrison,R D Randal,D W Forrest,J G Betts,W D Humphrey,D R Hardin,

Forty-two cycling, multiparous beef cows (percentage-Brahman) were given two injections of 500 ug Cloprostenol (CLP) 11 days apart. Cows were randomly allocated to be ovariectomized at 0, 12, 24, 36, 48, 60 or 72 hr after the second CLP injection. Mean CL weight declined within 36 hr after CLP. Mean concentration of P4 in luteal tissue increased between o and 60 hr, while mean P4 content per CL declined by 12 hr after CLP. There was a precipitous decrease in mean serum P4 by 12 hr following CLP injection. Serum E2 was elevated until 24 hr and then declined through 72 hr after CLP. Follicular T concentration increased from 0 to 48 hr and then decreased by 60 hr. We conclude that CLP caused rapid diminution of luteal function which was accompanied by a reduction in P4 content but not in P4 concentration. Futhermore, the concentration of E2 in large follicles decreased by 72 hr post-CLP which is consistent with an alteration of the steroidogenic pathway in the periovulatory follicle.

Cloprostenol inouced luteal regression in the beef cow. I. Ovarian response and endocrine changes. Publishing Authors By Initials

LM Harrison,RD Randal,DW Forrest,JG Betts,WD Humphrey,DR Hardin,

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Cloprostenol inouced luteal regression in the beef cow. I. Ovarian response and endocrine changes. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 23

Page Numbers: 511-21

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: Mar

YEAR: 1985

Cloprostenol inouced luteal regression in the beef cow. I. Ovarian response and endocrine changes. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Cloprostenol inouced luteal regression in the beef cow. I. Ovarian response and endocrine changes.

AFFILIATION: Texas A&M University Agricultural Research and Extension Center, Overton, TX 75684 USA.

Country: United States

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MEDLINETA: Theriogenology

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