THE EFFECT OF OOPHORECTOMY ON PLASMA OESTRONE AND ANDROSTENEDIONE LEVELS IN THE RAT

Abstract
Plasma estrone and androstenedione levels were measured in oophorectomized and sham-operated rats by means of radioimmunoassay. The mean estrone level in the oophorectomized animals was approximately 2/3 of that in the intact animals while the androstenedione levels were about half of those in the intact rats. A direct relationship was observed between the plasma estrone and androstenedione levels in the control animals and to a lesser extent in the oophorectomized animals. Approximately 50% of circulating androstenedione and 30% of circulating estrone originate in the ovaries in the female adult rat.

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