Experimental Physiology
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Quarterly Journal of Experimental Physiology 22.3 pp 249-267
© The Physiological Society 1932
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THE PHYSIOLOGY OF PREGNANCY IN THE RAT.—I. THE PROLONGATION AND INTERRUPTION OF PREGNANCY

Annie M. Hain 1

1 Department of Animal Genetics, University of Edinburgh

1. The gestation period in the rat can be prolonged by from 4 to 10 days by (a) administration of anterior pituitary tissue; (b) extract of human pregnancy urine; (c) alkaline extract of pituitary; (d) extract containing "purified" growth hormone.

2. Pregnancy is apt to be interrupted when injection of the urine extract is made in the early stages.

3. The evidence adduced suggests that the pregnant condition is not maintained solely by the corpus luteum, and that parturition is not due merely to degeneration of that body.






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Copyright © 1932 by the The Physiological Society.