Fig. 4From: N-acetylcysteine addition after vitrification improves oocyte mitochondrial polarization status and the quality of embryos derived from vitrified murine oocytesRepresentative micrographs of expanded blastocysts stained with Hoechst 33342 derived from fresh and vitrified murine oocytes after IVF. The letters in each panel represent: a) Fresh oocytes cultured in KSOM medium for 2 h; b) Vitrified oocytes cultured in KSOM medium for 2 h after warming; c) oocytes cultured in KSOM medium supplemented with 1 mM of NAC for 2 h prior to vitrification and cultured in KSOM medium for 2 h after warming; d) Vitrified oocytes cultured in KSOM medium supplemented with 1 mM of NAC for 2 h after warming. The scale represents 100 μm; the micrographs were taken using a 40 × objectiveBack to article page