Abstract
Summary
The administration of a known total dose of an ovary-stimulating pregnancy blood extract over periods of 10, 15, or 20 days produced a much greater increase in ovarian and uterine weights of immature rats than when the same total dose was given in 5 days. The opposite result was obtained with acid extracts of sheep anterior pituitary glands, as the injection of a known dose in 5 days produced a greater increase in ovarian weight than when the administration of the same total dose was spread out over periods of 10, 15, or 20 days.
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