Expression and regulation of miR-17a and miR-430b in zebrafish ovarian follicles

► miR-17a and miR-430b are expressed in zebrafish ovary. ► miR-17a and miR-430b levels in follicular cells decrease in late stages of follicle development. ► LH inhibits miR-17a and miR-430b expression in follicular cells, but not in oocytes.