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Parturient Paresis. III. A Study of Various Blood Constituents at Parturition in Mastectomized Cows^{1, 2,}

Departments of Dairy Husbandry and Veterinary Science, University of Wisconsin

ABSTRACT

The serum calcium and magnesium, and the plasma phosphorus and fat levels have been determined for 5 days prepartum, three times on the day of parturition, and 5 days postpartum for eight parturitions of five mastectomized and five parturitions of five intact cows.

Data are presented showing a greater, more consistent decline in the serum calcium and plasma fat of the intact cows than the mastectomized cows. Serum magnesium levels increased in the cows calving with intact udders and showed no appreciable change in the mastectomized cows. Plasma phosphorus levels showed a drop in both groups of cows.

¹ Part of these data were taken from a thesis presented by E. P. Niedermeier to the graduate faculty of the University of Wisconsin in partial fulfillment of the requirements for the degree of Doctor of Philosophy.

² Published with approval of the director of the Wisconsin Agricultural Experiment Station.

³ Present address: Animal Husbandry Department, Oklahoma A & M College, Stillwater.