Document Detail

Hyperthermia and body energy store effects on estrous behavior, conception rate, and corpus luteum function in dairy cows.
MedLine Citation:
PMID:  3235739     Owner:  NLM     Status:  MEDLINE    
The reproductive performance of 74 Israeli Holstein dairy cows was examined during summer. Cows were fed prepartum to reach high (3.8) and low (2.6) body condition scores by 1 mo prepartum. After calving, half of each group were cooled seven times a day for 30 min by sprinkling and ventilation. Cows were inseminated starting 60 d postpartum. Daily mean body temperatures of cooled and noncooled cows were 38.6 and 39.2 degrees C, respectively, with differences between them reaching 1 degree C and more during the hot hours. Body condition affected only the time taken postpartum to the start of ovarian activity (26 d for high and 32 d for low body condition groups). Estrous behavior lasted longer in cooled (16 h) than in noncooled (11.5 h) cows of the low body condition group only. Conception rate was higher in cooled than in noncooled cows (59 vs. 17%). Pregnancy rate at 90 d postpartum was higher in cooled (44%) than in noncooled cows (14%). Progesterone concentrations were higher in inseminated nonpregnant and in noninseminated cyclic cooled cows than in noncooled cows and were similar in pregnant cows of both cooled and non-cooled groups. The present cooling method appears to have a high potential for improvement of summer fertility.
D Wolfenson; I Flamenbaum; A Berman
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  71     ISSN:  0022-0302     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  1988 Dec 
Date Detail:
Created Date:  1989-05-11     Completed Date:  1989-05-11     Revised Date:  2003-11-14    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  UNITED STATES    
Other Details:
Languages:  eng     Pagination:  3497-504     Citation Subset:  IM    
Department of Animal Science, Faculty of Agriculture, Hebrew University, Rehovot, Israel.
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MeSH Terms
Body Temperature*
Cattle / physiology*
Corpus Luteum / physiology*
Estrus / physiology*
Pregnancy, Animal / physiology*
Progesterone / blood
Reg. No./Substance:

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