Abstract
Summary
Ultraviolet absorption studies of ether extracts of the blood plasma of pregnant women failed to reveal the presence of progesterone. Progesterone was recovered from rabbit plasma by ether extraction and measured by ultraviolet analysis after the intravenous administration of the hormone. In a like manner, testosterone may be recovered from the plasma of rabbits after intravenous administration. Chdestenone plasma levels could not be demonstrated after the intravenous administration of this substance. Testosterone and progesterone have a short life as ether extractable substances in the plasma of intact female rabbits. Hepatectomy doecreases significantly the rate of dissipation of ether extractable testosterone and progesterone from the blood plasma of the experimental animal.
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