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Effect of lameness on ovarian activity in post-partum holstein cows [electronic resource] /

by Garbarino, Eduardo Jose

Abstract (Summary)
ABSTRACT: Abstract of Thesis Presented to the Graduate School of the University of Florida in Partial Fulfillment of the Requirements for the Degree of Master of Science EFFECT OF LAMENESS ON OVARIAN ACTIVITY IN POSTPARTUM HOLSTEIN COWS By Eduardo Jose acute Garbarino May, 2004 Chair: Jorge Hernandez Major Department: Veterinary Medical Sciences An observational cohort study was conducted to examine the relationship between lameness and delayed ovarian cyclicity in post partum Holstein cows. We used 253 cows from a 600-cow dairy herd that calved during a 12-month period. Cows were classified into one of six categories of lameness during the first 35 days post partum using a locomotion scoring system. Cows were blood sampled weekly for detection of plasma P4 concentrations during the first 60 days post partum. Cows with a delayed resumption of ovarian cyclicity were those with consistent P4 concentrations < 1 ng/mL during the first 60 days post partum.
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School:University of Florida

School Location:USA - Florida

Source Type:Master's Thesis

Keywords:research cattle sex behavior animal ovary lameness

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