Microphotographs of 2-day-old mouse ovaries. (A) Section stained with hematoxylin and eosin for identification of follicular status. The IHC localizations for c-kit (B), SCF (C), and inhibin-α (D) were also carried out in the serial sections. Thick and thin arrows are primary and primordial follicles, respectively. SCF, stem cell factor; oe, ovarian epithelium. Bar = 100 μm.