I have learned that a female is born with all the eggs they will have in their lifetime. What I am learning through IVF with my wife is that they need to extract about a dozen eggs, but not just any egg, eggs that are enlarged/matured by medication? (And if they're too large, they're no good either)
Does this mean that all these eggs aren't "ready to go" yet? So the female body will only naturally mature, then release, that one egg per cycle? Can there be instances where the body releases an immature egg that can't be fertilized (a dud ovulation)?