In 2004 and 2005, Jonathan Tilly from Harvard University reported that female mice create new eggs throughout their lifetime, refuting the standard belief that females cannot form eggs after the fetal stage. Some people don't like that idea.
Keefe goes on to say that his team could find no evidence, using the most sensitive techniques, to support Tilly's conclusions. Based on this, Keefe concludes that Tilly was wrong and the traditional dogma remains true.
Which is all well and good, except Tilly analyzed
(.pdf) the paper (Liu et al.) and found many fatal flaws -- four of which he outlined, the first of which seems to be the most important.
The rest of the analysis follow along similar paths, with Liu et al.
drawing conclusions that are inconsistent with their data or not conducting tests properly.
Tilly also ably takes to task two other papers that claim to refute his work, which is quite entertaining in a nerd-fight kinda way.
The truth won't be known until future tests can be completed, but I would bet Tilly is right.
No Evidence Older Women Generate New Eggs [USF Health]