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Nutrition and the Treatment of Sterility in Dairy Cattle: A Review^*

Laboratory of Animal Nutrition, Cornell University, Ithaca, N. Y.

ABSTRACT

The relation between nutrition and infertility in dairy cattle is a difficult one to review because it has so many ramificatons. The direct literature is rather scanty compared with that upon the same subject in laboratory animals; much may be gathered by inference but little can be substantiated by reference to critical work. Malnutrition may affect the reproductive system in a variety of ways, directly, and indirectly, and it may take a wide variety of forms. Under practical conditions, one rarely finds a clear case of malnutrition due to a deficiency of one factor in the feed. The usual condition found is that in which a multiple deficiency exists. Underfeeding may be accompanied by poor quality of the feed; thus, an energy deficiency often is complicated by deficiencies in protein, phosphorus and vitamin A. A protein deficiency often is accompanied by a phosphorus deficiency, and a vitamin A deficiency by a protein and phosphorus deficiency.

^* Based upon a paper presented in the symposium on Reproductive Problems of Dairy Cattle at the 43rd Annual Meeting.