Abstract
Summary
Improved objective technics for assay of lactogenic and mammogenic hormones have been developed. The amount of lactogen and mammogen has been estimated in several different pituitary preparations by these assay methods. Wide differences in lactogen/mammogen ratios between preparations were demonstrated. These observations are taken to indicate that the pituitary hormone stimulating mammary gland growth (mammogen) is different from the hormone stimulating milk secretion (lactogen).
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