Follicle Structure Influences the Availability of Oxygen to the Oocyte in Antral Follicles

Figure 1

The antral follicle with the follicle wall, the antrum, and the COC labelled. In some follicles (particularly smaller follicles), the COC sits partially within the follicle wall; however, in many follicles it rests within the antrum, either next to the follicle wall or attached to it by a “stem” of granulosa cells as shown here.