Objective:To study the expression and possible roles of proto-oncogene c-erbB2 during the initiation growth of primordial follicles.Methods:Ovaries were collected from 2-day-old SD rats and cultured in the Waymouth culture system.In-situ hybridization,RT-PCR and immunohistochemistry were performed to assess the expressions of c-erbB2 mRNA and protein during the initiation growth of primordial follicles and after the effect of EGF.Western blot was used to observe the PCNA,p-ERK1/2 contents and correlation an...