Nature 428, 145–150 (2004).

In this Article, we estimated that germline stem cells generate approximately 77 new primordial oocytes per day in ovaries of postnatal female mice. It has since been drawn to our attention by Ton Schumacher that a line of reasoning used in our study to verify this value is circular. However, the initial value for daily oocyte renewal obtained from mathematical modelling is not derived from a circular argument. Accordingly, this oversight does not alter any of the data or the conclusions in our paper.