Table 2.

Metabolites and metabolic pathways related to lactation performance of sows.

	Metabolic pathway	Metabolites	Method
Carbohydrate metabolism	Glucolysis metabolism, alactose metabolism	Lactic acid, Fucose, Sorbose, glucose, galactose, allose, Ribose, Glucose 6-phosphate, Galacturonic acid, Mannitol, Rhamnose, Ribulose, Glucuronic acid lactone	GC-MS
Amino acid metabolism	Arginine and proline metabolism, Amino acid synthesis, Alanine, aspartate and glutamate metabolism, Glycine, serine and threonine metabolism	Cystine, Asparagine, Creatinine, Aspartic acid, Serine, Leucine, Isoleucine, Valine, Tryptophan, Citrulline, Cysteine, Proline, Creatine, Phenylalanine, Glutamine, Glutamate, Methionine, Arginine	GC-MS/LC-MS
Lipid metabolism	Glycerolipid metabolism, Fatty acid degradation	Glycerol 3-phosphate, Glycerol, Stearic acid, Cholesterol, Oleic acid, Linoleic acid, Palmitoleic	GC-MS