changes in FA composition induced by dietary treatment were greater for colostrum than for milk, which suggests that the metabolic regulation of FA composition was lower for the colostrum (Sampels et al., 2011).The total SFA of subcutaneous fat at weaning was not affected by diet, but the concentration of PUFA was lower in piglets from sows fed L than in those fed SFO. Gerfault et al. (1999) measured FA composition of backfat in pigs at birth and observed differences only for the concentration of C18:2n-6 and total PUFA.One week after weaning the concentration of C16:0 and C16:1n-7 was higher in milk than in subcutaneous or intramuscular fat of the pigs, and consequently, suckling piglets had a very high concentration of these FA (Bee, 2000a). Concentration of C16:0 in subcutaneous fat was not affected by diet, but, unexpectedly the concentration of C18:0 was higher in pigs from sows fed SFO than in pigs from sows fed L. It was also interesting to note that the concentration of SFA was lower in the subcutaneous fat of the piglet than in sows’ milk, whereas an opposite effect was observed for MUFA.Bee (2000b) and Cordero et al. (2011) observed a decrease in the concentration of C16:0 and C16:1n-7 in subcutaneous fat after weaning consistent with the higher content in milk as compared with solid feed. In the current experiment sampling time significantly affected the content of C12:0 (P=0.023) and C20:4n-6 (P=0.024) while for C16:1n-7 (P=0.093) only a tendency was observed in subcutaneous backfat. Weaned pigs rely on body energy reserves (glycogen and lipids) during the nitial stage of life (Le Dividich et al., 1980). The data of the current experiment suggest a selective beta-oxidation of previously