Figure 1
From: Ultrastructural changes in oocytes during folliculogenesis in domestic mammals
Transmission electron micrographs of primordial follicles. A: Pig primordial follicle with central nucleus and a large amount of lipid droplets at one pole of the oocyte. B: Bitch primordial follicle with peripheral nucleus. Note the abundance of round mitochondria homogeneously spread throughout the ooplasm. C: A representative nucleolus in the oocyte nucleus from a cattle primordial follicle. D: Detail of the association among lipid droplets, smooth endoplasmic reticulum (arrows) and mitochondria in pig oocyte. E: Detail of the close contact between granulosa cell and oocyte in cat primordial follicle showing many coated pits (thin arrows) in the cortical ooplasm. O: oocyte, Nu: nucleus, GC: granulosa cells, L: lipid droplet, Mt: mitochondria, *: nucleolus.