Why Egg Freezing Has Become the Most Important Fertility Conversation
The Biology of Egg Aging — Explained Simply
You were born with all the eggs you will ever have — roughly 1–2 million immature eggs. By puberty, that number is down to about 300,000–500,000. Every month, whether or not you ovulate, hundreds of follicles are lost. By 35, you may have around 25,000 remaining — and quality, not just quantity, begins to decline faster.
Egg quality refers to chromosomal normality — a 25-year-old's egg has roughly a 75–80% chance of being chromosomally normal. A 40-year-old's egg: closer to 40–50%. This is why age is the single most important variable in fertility — and why freezing eggs at 28, 30, or 32 is very different from freezing at 38.
Social vs Medical Egg Freezing — Which Are You?
Social egg freezing: You are healthy, your ovaries are functioning normally, but you're not ready to have a baby yet due to personal, professional, or relationship circumstances. You want to buy time.
Medical egg freezing: You have a condition — cancer requiring chemotherapy, endometriosis reducing your ovarian reserve, a genetic condition affecting your ovaries, or premature ovarian insufficiency risk — that makes protecting your fertility urgent. In these cases, egg freezing is not optional — it is time-critical.
Both are valid. Both deserve the same high-quality clinical care.