Expression of <i>dazl</i> RNA during oogenesis.

<p>(A and B) Lower magnification view showing different stages of oocytes (I to III) and dot-like structures of <i>dazl</i> RNA. (C) Larger magnification of the framed area in (B), highlighting hollow-like structure of <i>dazl</i> RNA. (D and E) Larger magnification of the framed area in (A), highlighting a cluster of undifferentiated oogonia (og1) and larger-sized, differentiating oogonia (og2). (F and G) Larger magnification of the framed area in (D and E), highlighting oogonia (og1) and early oocytes at stage I with residual nuclear staining by DAPI, and the absence of <i>dazl</i> signal in somatic cells (asterisk).