Germline stem cells in the postnatal mammalian ovary: A phenomenon of prosimian primates and mice?

The paper by Johnson et al. "Germ line stem cells and follicular renewal in the postnatal mammalian ovary" published in Nature on the 11th of March [1] suggests that a population of germ line stem cells exist within the adult mouse ovary and that oocyte numbers are regulated by a balance of activation of these cells and cell death. This paper should be viewed in its historical context as it reignites a debate that was thought to have been settled in the 1950s but one in which exceptions to the accepted dogma have previously been found.