HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Spielman, A. A. Articles by Pomeroy, B. S. Search for Related Content PubMed Articles by Spielman, A. A. Articles by Pomeroy, B. S.

General Appearance, Growth and Reproduction of Thyroidectomized Bovine¹

University of Minnesota, St. Paul, Minnesota

ABSTRACT

1. The effects of thyroidectomy upon the general appearance and behavior of immature and mature bovine are analogous to those reported for other mammals.
   
2. Partial thyroidectomy failed to produce any symptoms of hypothyroidism in immature or mature bovine.
   
3. Growth was definitely retarded by thyroidectomy.
   
4. Growth was resumed during the late states of pregnancy, probably due to beneficial effects of the thyroid of the developing fetus.
   
5. The physical manifestations of estrus and male breeding behavior were absent, although the production of fertile ova and sperm occurred, as shown by birth of three normal calves from thyroidectomized parents.
   
6. Thyroid therapy restored normal breeding behavior in the male and female.
   

¹ Taken from data presented in a thesis to the Graduate Faculty of the University of Minnesota by A. A. Spielman in partial fulfillment of the requirements for the degree of Doctor of Philosophy. Scientific Journal Series Paper No. 2205, Minnesota Agricultural Experiment Station.

^* Now Assistant Dairy Husbandman, Washington Agricultural Experiment Station.