The effects of FSH-priming and dominant follicular regression on the superovulatory response of cattle.

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The effects of FSH-priming and dominant follicular regression on the superovulatory response of cattle. Abstract Text:

B W Gray,R E Cartee,D A Stringfellow,M G Riddell,K P Riddell,J C Wright,

Thirty superovulatory treatments were administered to 19 mixed-breed, nonlactating cows. In 10 superovulatory treatments, the cows were primed with follicle stimulating hormone (FSH) on the second and third day of the estrous cycle, and in another 10 superovulatory treatments, the cows received no priming dosage of FSH. Initiation of the superovulatory treatments in both groups was determined by ultrasonically monitoring for regression of the dominant anovulatory follicle. Still another 10 superovulatory treatments were begun on Day 10 without regard for regression of the dominant anovulatory follicle and without a priming dosage of FSH. The mean days for starting the superovulatory treatment in the FSH-primed cows, in the nonprimed cows and in the controls were 10.5, 11.9 and 10 days, respectively. All cows were treated with eight injections of FSH at 12-hour intervals in a declining dosage (36 mg total). Cows were bred naturally and embryos collected nonsurgically seven days later. There was no significant difference (P>0.05) between the total number of embryos or transferable embryos in the three treatment groups. In this study neither priming on Days 2 or 3 nor initiating the superovulatory treatment, based on the morphologic regression of the dominant anovulatory follicle, was an effective means for improving the superovulatory response in cattle.

The effects of FSH-priming and dominant follicular regression on the superovulatory response of cattle. Publishing Authors By Initials

BW Gray,RE Cartee,DA Stringfellow,MG Riddell,KP Riddell,JC Wright,

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The effects of FSH-priming and dominant follicular regression on the superovulatory response of cattle. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 37

Page Numbers: 631-9

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: Mar

YEAR: 1992

The effects of FSH-priming and dominant follicular regression on the superovulatory response of cattle. Information

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LANGUAGE: eng

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Grant and Affiliation Information for The effects of FSH-priming and dominant follicular regression on the superovulatory response of cattle.

AFFILIATION: Department of Anatomy and Histology College of Veterinary Medicine Auburn University, AL 36849 USA.

Country: United States

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MEDLINETA: Theriogenology

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