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An Exceptional Case of Milk Secretion and its Bearing on the Theories Concerning Mammary Development

Maryland Experiment Station, College Park, Maryland

ABSTRACT

Our present knowledge of the factors controlling the development of the mammary glands and the activities of the same does not afford an explanation of all cases of milk secretion. This is especially noticeable in the case of secretion of normal milk by a suckling doe kid four months old. This kid had not reached sexual maturity so any theory of mammary growth or milk secretion involving the ovaries, corpora lutea, foetus or placenta is not applicable. The udder of this kid had not been massaged, suckled or treated in any way to stimulate its growth or secretion. It is possible that some other of the internal secreting glands have a prominent part in regulating the growth and secretory activity of the mammary glands. There is some evidence in favor of the theory that the pituitary body (hypophysis cerebri) may function in this way.

In milk secretion resulting from a normal parturition the non-removal of milk for a period of nineteen days would result in a discontinuance of the secretion. The non-removal of milk for this period of time in the lactating kid did not inhibit the secretion of the same.

The occurrence of colostrum immediately after parturition must be due to some stimulus or control resulting from the condition of pregnancy since, it does not occur in lactation not associated with pregnancy.

This article has been cited by other articles:

				I. G. MACY, H. A. HUNSCHER, E. DONELSON, and B. NIMS HUMAN MILK FLOW Arch Pediatr Adolesc Med, June 1, 1930; 39(6): 1186 - 1204. [Abstract] [PDF]