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Gross Composition and Variation of the Components of Baboon Milk during Artificially Stimulated Lactation¹

Division of Biological Growth and Development, Southwest Foundation for Research and Education, San Antonio, Texas

For a study of the early nutritional requirements of baboons (Papio anubis, P. cynocephalus and P. papio), lactation was induced and maintained by treatment with oxytocin and repeated milking after the removal of their infants by cesarean section. The gross composition of this milk (from days 11 to 35) was as follows: (in grams per 100 ml) total solids, 14.3; lipids, 4.8; crude protein, 2.0; lactose, 7.0; and ash, 0.30. The specific gravity and pH were 1.027 and 7.44, respectively. The secretion obtained during the first 36 hours was richer than the later milk in crude protein and ash, and poorer in lipids and lactose. Variations of these constituents and properties with each other, with the sample weight and with the length of lactation were determined. As lactation progressed, the pH increased significantly and the concentrations of lipids and crude protein decreased.

Manuscript received 9 November 1967.