in well-developed ovarian follicles in the late stages of follicular growth , immunoreactivity of p-450arom was only seen in granulosa cells while p-450 ( 17 alpha ) and p-450scc activity was confined to theca interna cells , confirming that follicular oestrogen is produced in granulosa cells by the aromatization of androgens derived from the theca interna cells .
C0018120
ovarian follicles
C0018207
granulosa cells