Extended function of the corpus luteum and earlier development of the second follicular wave in heifers treated with bovine somatotropin.

Extended function of the corpus luteum and earlier development of the second follicular wave in heifers treated with bovine somatotropin. Research Abstract Details 

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Extended function of the corpus luteum and earlier development of the second follicular wave in heifers treated with bovine somatotropin. Abstract Text:

M C Lucy,T L Curran,R J Collier,W J Cole,

Effects of recombinant bovine somatotropin (bST) on growth of the corpus luteum (CL) and development of ovarian follicles were tested. Starting at estrus (Day=0), the following treatments were administered: control (saline injected Days 0 to 19, n=5); bST[0-9] (25 mg bST injected Days 0 to 9, saline injected Days 10 to 19, n=5); bST[10-19] (saline injected Days 0 to 9, 25 mg bST injected Days 10 to 19, n=5); and bST[0-19] (25 mg bST injected Days 0 to 19, n=6). Blood was collected daily for progesterone analysis, and ultrasound examinations were performed daily for measurement of follicles and CL. Compared with the heifers treated with saline, those treated with bST had larger CL and more progesterone during the early (/=10 mm) follicles was greater (P<0.01) and largest follicles were smaller (P<0.001) in bST than in saline-treated heifers. Estrous cycle length and ovulation rate were similar for each group. In conclusion, bST increased initial development of the CL and extended its function. Furthermore, the second follicular wave was earlier with bST.

Extended function of the corpus luteum and earlier development of the second follicular wave in heifers treated with bovine somatotropin. Publishing Authors By Initials

MC Lucy,TL Curran,RJ Collier,WJ Cole,

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Extended function of the corpus luteum and earlier development of the second follicular wave in heifers treated with bovine somatotropin. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 41

Page Numbers: 561-72

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: Feb

YEAR: 1994

Extended function of the corpus luteum and earlier development of the second follicular wave in heifers treated with bovine somatotropin. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Extended function of the corpus luteum and earlier development of the second follicular wave in heifers treated with bovine somatotropin.

AFFILIATION: Animal Sciences Division, Monsanto Co., St. Louis, MO 63198 USA.

Country: United States

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MEDLINETA: Theriogenology

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