Figure 4From: Fine morphological assessment of quality of human mature oocytes after slow freezing or vitrification with a closed device: a comparative analysisHuman CO, SFO and VO at MII stage. CG distribution. By TEM, a rim of CG is seen just beneath the oolemma of a CO (a). CG appear instead sparse or isolated forming a discontinuous layer in both SFO (b) and VO (c). mv: oocyte microvilli. Bar is: 1 μm (a-c).Back to article page