Egg-Freezing: The Brutal Truth

A woman who freezes 10 eggs at age 25 has roughly an 80% chance of a live birth — but wait until 40, and those same 10 eggs drop her odds below 30%.

Quick Take

Age is the single biggest factor in frozen egg success — not the clinic, not the technology.
Women under 35 who freeze 20 or more eggs can see live birth rates as high as 88-90%.
Only about 12% of women who freeze eggs ever actually use them.
Supplements like NAD+ are being marketed as egg quality boosters, but large-scale human trials are still unfinished.

The Number That Changes Everything: Your Age at Freezing

Reproductive endocrinologist Dr. George Kovalevsky puts it plainly: age is the single most important predictor of fertility treatment success. The data backs him up hard. Women aged 30 to 34 who freeze more than 18 eggs have an 80% or better chance of a live birth later on. That number does not stay high for long. After the mid-30s, egg quality drops and the rate of abnormal chromosomes in eggs rises sharply, cutting success rates fast.

The biology behind this is not subtle. As women age, their ovarian reserve shrinks and more eggs carry chromosome errors — a condition called aneuploidy. Those errors lead to failed implantation or miscarriage. Freezing eggs earlier captures them before those errors accumulate. That is the entire logic of the procedure, and it is well supported by years of clinical data.

How Many Eggs You Actually Need

Egg count matters just as much as age. Shady Grove Fertility recommends that women in their mid-30s or younger freeze 20 to 25 mature eggs. Women older than that should aim for 25 to 30. Those numbers are not arbitrary. Data from Extend Fertility’s eight-year outcome study found that women under 35 who froze at least 20 eggs hit an 88.9% live birth rate. Freeze fewer than 10 eggs at any age, and the math gets uncomfortable fast.

Here is what the age-and-quantity combination looks like in practice. A 33-year-old who freezes 20 eggs has roughly a 90% chance of a live birth. That same woman with only 10 eggs drops to about 69%. At age 40, 10 eggs yields below 30%. The difference between those outcomes is not luck — it is timing and volume, two things a woman can actually plan for.

The Supplement Industry Spotted This Gap First

With success rates so tied to age, a predictable market emerged: products promising to slow or reverse egg aging. Nicotinamide adenine dinucleotide, known as NAD+, is the current front-runner. Animal studies show that raising NAD+ levels in aging eggs improves quality markers. Some early human research is encouraging. One clinical trial registered with the National Institutes of Health tested an NAD+-boosting product on women undergoing in vitro fertilization (IVF).

But the evidence is not settled. Large-scale, placebo-controlled human trials are still running. One study cited in the field involved only 50 women — not nearly enough to draw firm conclusions. Researchers also flag a practical problem: women undergoing fertility treatment resist taking a placebo when the supplement is available over the counter. That reluctance makes rigorous trials hard to complete, which means the gap between commercial claims and clinical proof stays wide.

What the Supplement Promoters Are Not Saying Clearly

Dr. Mark Ratner, Chief Science Officer at Therologics, has appeared in online videos discussing NAD+ and fertility while also promoting the company’s Ova NAD+ product, complete with a discount code. His company claims its products are used by about 70% of IVF clinics in the United States. A survey of 400 IVF doctors told a different story: only one-third said they were familiar with the science behind NAD+, and just half of those actually used it clinically. That gap between marketing claims and doctor familiarity is worth noting.

Coenzyme Q10, or CoQ10, followed the same path years earlier — animal data, clinic adoption, commercial products, and then human trials that showed limited results. NAD+ is following that exact same cycle. The science may eventually catch up to the marketing. It has not yet. Women deserve to know the difference between “promising in early research” and “proven to improve your odds.”

The Statistic Nobody in the Industry Leads With

Here is the number that reframes the whole conversation: only about 12% of women who freeze eggs ever use them. That means roughly 88 out of every 100 women who go through the cost, the hormone injections, and the retrieval procedure never come back for their eggs. Some find a partner sooner than expected. Some conceive naturally. Some simply move on. The eggs sit in storage, unused.

That statistic does not mean egg freezing is a bad decision. For women who do return to use their eggs, having frozen them young can be the difference between having a child and not. But it does mean the decision deserves clear eyes. Know your age. Know your egg count target. And be skeptical of any supplement that promises to change the biology your doctor just explained.