Fig. 1

Identification of ovaries at different developmental stages of S. pharaonis. A-D The morphology of ovaries at different stages by photograph; A The morphology of the ovary at stage I, B The morphology the ovary at stage II, C The morphology of the ovary at stage III, D The morphology of the ovary at stage IV. E-H The histomorphology of ovaries at different stages by HE staining; E The oocytes at stage I, F The oocytes at stage II, G The oocytes at stage III, H The oocytes at stage IV