PKCα immunostainings in postnatal mouse ovaries. (a1-a6) PND60 ovary primordial (a1), primary (a2), secondary (a3), pre-antral (a4), antral (a5) follicles and CL (a6). (b1-b3) PND21 ovary primordial and primary (b1), secondary (b2), pre-antral (b3) follicles. (c1-c3) PND7 ovary primordial and primary (c1), secondary (c2) follicles. PND1 ovary (c3). a7, b4 and c4 are representative negative control sections. Counterstain hematoxylin. Red arrows: Primordial follicles, Blue arrows: Primary follicles. Black arrow: Secondary follicle.