Mechanical masking of neurosensory pathways at the calf-teat interface: Endocrine, reproductive and lactational features of the suckled anestrous cow.

Mechanical masking of neurosensory pathways at the calf-teat interface: Endocrine, reproductive and lactational features of the suckled anestrous cow. Research Abstract Details 

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Mechanical masking of neurosensory pathways at the calf-teat interface: Endocrine, reproductive and lactational features of the suckled anestrous cow. Abstract Text:

W R McVey,G L Williams,

A mammary somatosensory mask was employed in suckled anestrous beef cows to attenuate signals that were hypothesized to play a direct regulatory role in postpartum anestrus. Cows (n = 20) were randomly assigned to one of three treatment groups on Days 15 to 20 postcalving. The three treatments were: 1) masked (n = 7); 2) suckled (negative control, n = 6); and 3) weaned (positive control, n = 7). Four layers of surgical glove latex were used to cover the teats and ventro-lateral prominence of the udder of masked cows with a nonhardening, nontoxic adhesive (Day 0). Masks were designed to prevent direct contact between the skin of the teat/udder and the mouth of the calf and to allow normal suckling and milk removal. Masks were left in place for 7 d, with calves in the weaned group removed to a remote location for 7 d. Calves in the suckled group were allowed ad libitum suckling. Calves in the masked group tended (P < 0.1) to suckle longer than calves in the suckled control group (11.3 +/- 1.3 vs. 7.8 +/- 1.3 min/suckle) posttreatment; however, suckling frequency and calf weight gains did not differ due to treatment. Weaned cows exhibited a four-fold increase (P < 0.01) in the frequency of luteinizing hormone (LH) pulses on Day 2 relative to suckled and masked cows. The percentage of animals ovulating within 12 d after treatment differed (P < 0.05) and was 100, 50 and 0% for weaned, suckled and masked cows, respectively. Presence of the latex mask allowed essentially normal suckling and lactation, but failed to attenuate (and may have potentiated) the negative effects of suckling on secretory patterns of LH, ovulation and estrus.

Mechanical masking of neurosensory pathways at the calf-teat interface: Endocrine, reproductive and lactational features of the suckled anestrous cow. Publishing Authors By Initials

WR McVey,GL Williams,

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Mechanical masking of neurosensory pathways at the calf-teat interface: Endocrine, reproductive and lactational features of the suckled anestrous cow. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Theriogenology

VOLUME: 35

Page Numbers: 931-41

Journal Abbreviation: Theriogenology

ISSN: 0093-691X

DAY: 26

MONTH: May

YEAR: 1991

Mechanical masking of neurosensory pathways at the calf-teat interface: Endocrine, reproductive and lactational features of the suckled anestrous cow. Information

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LANGUAGE: eng

NlmUniqueID: 421510

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Grant and Affiliation Information for Mechanical masking of neurosensory pathways at the calf-teat interface: Endocrine, reproductive and lactational features of the suckled anestrous cow.

AFFILIATION: Animal Reproduction Laboratory, Texas Agricultural Experiment Station The Texas A&M University System, Beeville, TX 78102 USA.

Country: United States

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MEDLINETA: Theriogenology

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