Figure 3.

NIR spectra from second trimester serum samples. Each trace corresponds to the NIR spectrum of one serum sample, that is, of one subject. Spectra from NGT and GDM pregnant women are colored in blue and red, respectively. Four spectral ranges are considered: Full, from 10,500 to 4000 cm⁻¹; Range 1, from 10,500 to 7600 cm⁻¹; Range 2, from 7600 to 5100 cm⁻¹; and Range 3, from 5100 to 4000 cm⁻¹. NIR: near-infrared; NGT: normal glucose tolerance; GDM: gestational diabetes mellitus; R1: Range 1; R2: Range 2; R3: Range 3.