A new study by the University of St. Andrews and Edinburgh University shows that women lose about 90 percent of their ovarian eggs by the time they're age 30, making it much more difficult to have ...

"Maintaining the egg's naturally quiet metabolism could be a better idea for preserving quality," said molecular biologist Elvan Böke.

Demand for egg freezing has skyrocketed as women put fertility on hold. The costly procedure has brought happy endings to some women, but it doesn't offer any guarantees.