The Colorado Center for Reproductive Medicine (CCRM) announced today
that their first baby produced from oocyte cryopreservation, or egg
freezing, was born this month.
Sperm and embryos have been frozen successfully for decades, but
freezing of unfertilized eggs has only just become a possibility.
Previously, researchers had difficulty in egg freezing, because slow
cooling leads to ice crystal formation and other damaging effects on
the eggs.
William Schoolcraft, M.D., CCRM founder, visited scientists in
Japan and Spain to learn about a new method called vitrification, which
involves a very rapid rate of cooling and warming and protects the egg
from ice crystal formation. The survival rate with vitrification is
greater ...