The progeny of all sows was also included in the experiment. After birth piglets remained in the same experimental group as their mother. Since 7th d of age, the piglets were fed diets differing in presence or absence of genetically modified soybean meal MON-40-3-2 (26% in diet) and/or maize MON810 (10% in diet). Feeds for all groups of piglets were similar in metabolic energy (13.3 MJ), content of crude protein (214 g), and amino acids level (Lys-13.2 g, Met+Cys- 7.8 g). On the 28th d