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Principal components analysis demonstrates that the global metabolome from placenta samples in spontaneous preterm birth (SPTB) is overall distinguishable from the metabolome of term placenta samples. SPTB placentas: dark gray circles (n = 12); Term placenta: light gray circles (n = 12). For the analysis shown in Figure 1, the X-axis (Comp1) represents 34.79% of the variability between samples and the Y-axis (Comp 2) represents 10.79% of the variability between samples.
