Fig. 3From: Correlation analysis of serum reproductive hormones and metabolites during multiple ovulation in sheepThe second time (2nd) Metabolomic analysis of serum from ewes with multiple ovulation treatment. PCA analysis results of IE group under positive ion mode (a) and negative ion mode (b) and SE group under positive ion mode (c) and negative ion mode (d). PLS-DA analysis results of IE group under positive ion mode (c) and negative ion mode (d) and SE group under positive ion mode (g) and negative ion mode (h)Back to article page