Higher magnification of D7 PMSG treated H & E stained ovarian sections. The epithelial cells appear proliferative and multilayered. A cohort of PF is invariably observed below such regions of OSE. Note increased vascularity in this region (star) and cytoplasmic connection between the oocytes of two adjacent PF (arrows). The PF assembly occurs in the OSE (arrowhead). The oocytes are large in size with abundant pale cytoplasm whereas granulosa cells have more fibroblast-like appearance and are observed surrounding the oocytes. Bar: 20μm.