Fig. 1
From: Liquid biopsy of embryo culture medium for assessing human embryo viability using Raman spectroscopy

(a) Mean Raman spectra in the 1800–600 cm−1 region for the two control culture media used in this study, with media A designated for developmental culture and medium B for recovery culture. (b) Mean Raman spectra in the 1500–600 cm–1 region for medium A, comparing the control spectra with those at different developmental stages.