A study published by the University of St. Andrews and Edinburgh University in Scotland found that 95 percent of women have less than 12 percent of their ovarian egg reserve left by age 30 and only 3 percent by 40. We already knew that after the age of 30 the clock started ticking pretty fast, but already having lost nearly 90 percent of your ovarian eggs by the age of 30 is pretty surprising. As this article points out, this may have some women rethink their life plan and the timing of the unfolding events from graduate school to career. The study was based on information collected from 325 women of varying ages in the United Kingdom, the United States and Europe. This study is significant because it is the first time researchers have provided a better understanding of how many eggs a woman has in her ovaries and provides evidence that women have a fixed number of eggs that decline with increasing age. Did you have problems conceiving after age 30?