Restricting calf presence without suckling compared with weaning prolongs postpartum anovulation in beef cattle
To determine how continued presence of a calf affected duration of postpartum anovulation, 23 udder-intact cows and their calves were assigned to three treatments on d 4 to 9 postpartum (experimental d 0). The treatments were 1) calf present with unlimited contact with its dam (n = 8), 2) calf restr...
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Published in | Journal of animal science Vol. 74; no. 1; p. 190 |
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Main Authors | , , |
Format | Journal Article |
Language | English |
Published |
United States
01.01.1996
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Subjects | |
Online Access | Get more information |
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Summary: | To determine how continued presence of a calf affected duration of postpartum anovulation, 23 udder-intact cows and their calves were assigned to three treatments on d 4 to 9 postpartum (experimental d 0). The treatments were 1) calf present with unlimited contact with its dam (n = 8), 2) calf restricted to noninguinal contact with its dam (n = 8), and 3) calf weaned from its dam (n = 7). Calves in the calf-present and calf-restricted treatments were weaned after 5 wk. Based on daily measurements of blood progesterone, days to first ovulation after onset of treatments were 35.4 +/- 2.2, 22.5 +/- 2.2, and 14.3 +- 2.2 for the calf-present, calf-restricted, and calf-weaned treatments, respectively; each one differed (P 0.01) from the others. Mean concentrations of LH were greater (P 0.05) in the calf-restricted treatment and tended (P |
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Bibliography: | 9615238 L53 |
ISSN: | 0021-8812 1525-3163 |
DOI: | 10.2527/1996.741190x |