Fig. 4From: Transcriptome characterization of BPG axis and expression profiles of ovarian steroidogenesis-related genes in the Japanese sardineHistological micrographs of Japanese sardine ovaries at various stage of development. Ovarian developmental stages are as follows: immature, a; previtellogenic growth, b; mid-vitellogenesis, c; late vitellogenesis, d. Bars = 200 μmBack to article page