Ovarian follicular granulosa cells surround and nurture oocytes. and produce sex steroid hormones. It is believed that during development the ovarian surface epithelial cells penetrate into the ovary and develop into granulosa cells when associating with oogonia to form follicles. Using bovine fetal ovaries (n = 80) we identified a novel cell type. https://www.bbmbatteryes.shop/product-category/1125/