The natural maternal aging process has a dramatic negative effect on the quality of a woman’s eggs. The Good News: Thanks to the 20 plus years of research and clinical experience in successful egg freezing by Dr. John Zhang, women no longer have to be cornered into motherhood by their biological clocks. A woman has the option of freezing her eggs to preserve her future fertility into her advanced reproductive years (mid- to late -30s to early 40s + Beyond).
The younger your eggs are when trying to conceive, the better chance you will have of getting pregnant. If you know that one day you would like to become a mother, but feel that now is just not the time, I recommend freezing your eggs. – Dr. John Zhang as quoted in Parenting.