Fig. 6
From: Liquid biopsy of embryo culture medium for assessing human embryo viability using Raman spectroscopy

(a) Mean Raman spectra in the 1500–600 cm−1 region of medium B for control and across the developmental stages of blastocysts. Score plots of (b) PC 1 vs. PC 3 and (c) PC 2 vs. PC 4. (d) Loading plots of PCs extracted via PCA from the spectral data for G3–G6.