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Plasma Levels of FFA, Glycerol, ß-Hydroxybutyrate and Blood Glucose during the Postnatal Development of the Pig¹

Department of Pediatrics, Karolinska Institutet, Kronprinsessan Lovisas Barnsjukhus, Stockholm, and the Department of Animal Nutrition, Hygiene and Genetics, Royal Veterinary College, Stockholm, Sweden

Levels of plasma free fatty acids (FFA), glycerol, ß-hydroxybutyrate and blood glucose were determined in 175 sow-nursed piglets ranging in age from newborn to 9 weeks old, and in 22 newborn piglets starved up to 24 hours after birth. At birth, the concentrations of FFA and glycerol are very low. Animals starved for 6 to 24 hours from birth show a very moderate increase in FFA and unchanged or decreased concentrations of glycerol and ß-hydroxybutyrate. These results are probably related to the low content of body fat in the newborn pig. During the first hours of suckling there is a significant rise in FFA and glycerol. A significant positive correlation between these parameters was found in two groups, aged 16 to 24 hours and 9 weeks. ß-Hydroxybutyrate is extremely low in cord blood. A slight but significant increase is seen after birth with the peak value occurring between 8 and 12 hours. The blood glucose level is low at birth and there is a significant increase after the first nursing. The same glucose level persists throughout the first weeks of life. No correlation was found between glucose and FFA levels.

² Requests for reprints should be addressed to Bengt Persson, M.D., Kronprinsessan Lovisas Barnsjukhus, Polhemsgaten 30, 112 30 Stockholm, Sweden.

Manuscript received 5 September 1968.

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