Fig. 8

Photomicrograph of PRA immunoexpression in the sheep ovary during the follicular phase. A Showing strong PRA immunoexpression in the surface epithelial cells (S) and slight PRA immunoexpression in the primary (PrF) follicles. B slight PRA immunoexpression in the primordial (PF). C Showing strong PRA immunoexpression in the endothelial cells (arrowheads) of blood vessels (BV) and moderate PRA immunoexpression in the stroma cells (St). D Showing slight PRA immunoexpression in the granulosa cells (G), theca interna cells (TI) and theca externa cells (TE) of the growing follicles (GF). E Showing slight PRA immunoexpression in the granulosa cells (G) and theca folliculi cells (TF) of the small antral follicles (SAF). F Showing strong PRA immunoexpression in the granulosa cells (G) of the preovulatory follicles. Note the large antral cavity. G Showing slight PRA immunoexpression in the granulosa cells (G) and negative PRA immunoexpression in the apoptotic granulosa cells (arrowheads) of the atretic follicles (AF). H Showing negative PRA immunoexpression in the fibrous tissue (fibrocytes and collagen fibers) of the regressed corpus luteum (RCL). I Showing slight PRA immunoexpression in the fibrous tissue (fibrocytes and collagen fibers) and blood vessels (BV) of the corpus albicans (CA). Original magnification; A-I: X400, scale bar = 50 µm