Abstract
Summary
In young pigeons of the same age and race the response of the crop-glands to prolactin administered by 5 different routes has been studied and found to differ widely. Subcutaneous and intracutaneous injections are about 11 times as efficient as intravenous injections, about 5 times as efficient as intramuscular injections, and about 8 times as efficient as intraperitoneal injections at the dosage level used.
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