Egg freezing vs donor eggs: when the odds flip

The egg freezing vs donor eggs decision turns on whose age the odds follow. Your own frozen eggs carry your age at retrieval, so their odds fall steeply after 40. Donor eggs carry the donor's age, which the American Society for Reproductive Medicine's 2024 guidance puts at 21 to 34, so the per-transfer live birth rate stays near 50%.

The one variable that separates the two routes

Both paths end the same way: an embryo is transferred into your uterus and you carry the pregnancy. The difference is upstream, in whose egg made the embryo.

When you use your own frozen eggs, every number that matters, thaw survival, blastocyst formation, and above all the share of embryos with the right number of chromosomes, was fixed on the day of retrieval. Freezing stops the clock; it does not turn it back. Eggs frozen at 42 are 42-year-old eggs whenever you thaw them.

Donor eggs reset that variable and only that variable. ASRM's Gamete and embryo donation guidance (Fertility and Sterility, 2024) states that oocyte donors "should be of legal age in their state, preferably between the ages of 21 and 34 years old," and caps a donor at six retrieval cycles. In the UK, the Human Fertilisation and Embryology Authority reports a median new egg donor age of 30 across 2019 to 2023. So the embryo's genetic starting point is a woman in her twenties or early thirties, regardless of whether you are 38 or 48.

Your uterus still matters, but less than most people expect. Yeh and colleagues analyzed 27,959 fresh donor oocyte cycles from the Society for Assisted Reproductive Technology registry (Fertility and Sterility, 2014) and found recipients aged 39 and under had implantation, clinical pregnancy, and live birth rates similar to the 40-to-44 reference group. Rates fell significantly only at 45 to 49 and again at 50 and over. Between roughly 35 and 44, donor-egg outcomes are close to flat across recipient age.

What the numbers actually say on each side

Your own frozen eggs

The odds here come from the Goldman 2017 counseling model, which is what our success rate calculator runs on. It gives the probability of at least one live birth from a whole bank of frozen mature eggs, and the figure in parentheses below is the same model after the authors' own 19% frozen-versus-fresh honesty adjustment.

With 20 mature eggs banked, the model gives a 69% chance (56% adjusted) of at least one live birth at 38, 51% (42%) at 40, 37% (30%) at 42, and 15% (12%) at 44. Read as a per-egg rate, one mature egg is worth about 5.7% at 38, 3.5% at 40, 2.2% at 42, and 0.8% at 44.

The more revealing figure is how many eggs the model demands for a 75% chance: 24 eggs at 38, 38 at 40, 61 at 42, 94 at 43, and 170 at 44. Those targets are the real constraint, because a retrieval cycle in your forties rarely produces more than a handful of mature eggs. Our page on egg freezing at 40 works through what that means in cycles and dollars.

Donor eggs

Braun and colleagues analyzed 48,679 donor oocyte embryo transfers from the CDC's National ART Surveillance System for 2018 to 2020 (Fertility and Sterility, 2024). In fresh embryo transfers, the live birth rate was 55.9% with fresh donor eggs and 46.2% with frozen donor eggs. In frozen embryo transfers, it was 45.8% with fresh donor eggs and 41.3% with frozen donor eggs. Those are United States figures, per transfer.

The UK regulator's numbers are lower and measured differently. HFEA data for 2018 to 2019 put donor-egg birth rates above 30% per embryo transferred at every recipient age. For patients aged 43 to 50, the birth rate was 31% per embryo transferred with donor eggs, against 5% with their own eggs. UK figures are per single embryo transferred under a stricter single-embryo-transfer culture, so they are not interchangeable with the US per-transfer numbers above.

Read the last column before comparing rows. The own-egg percentages are cumulative over an entire frozen cohort; the donor percentages are for one transfer, and a recipient who has more than one embryo gets more than one attempt. Comparing 37% at 42 against 46.2% per donor transfer understates the gap rather than exaggerating it.

Where the crossover actually falls

There is no birthday at which one route legally or biologically replaces the other. The crossover is arithmetic, and it happens when the number of eggs the model requires exceeds the number you can realistically retrieve.

At 38, the model asks for 24 mature eggs for a 75% chance. That is demanding but reachable, usually across two cycles, which is why freezing at 38 still competes with donor eggs on odds. At 40 the target is 38 eggs. At 42 it is 61, and at 44 it is 170. Once the requirement passes what two or three stimulation cycles can plausibly produce for your ovarian reserve, banking more of your own eggs stops buying meaningful probability, while a donor cycle offers roughly 46% to 56% per transfer in US registry data whatever your age.

Three things move that crossover earlier or later for an individual, and none of them is age alone. Low ovarian reserve, measured by AMH and antral follicle count, moves it earlier because your per-cycle yield is below average. Wanting two children moves it earlier, because the model's two-child probabilities at 40 and beyond are far lower than the one-child figures. A strong preference for a genetic link, and a willingness to spend several cycles on a lower probability, moves it later. Our page on whether egg freezing is worth it covers the utilization data that sits underneath all of this.

One practical note: this comparison assumes you are freezing eggs for later use. If you are ready to try for a pregnancy now, the relevant comparison is egg freezing vs IVF, not donor eggs, because a fresh own-egg IVF cycle skips the freeze-thaw loss entirely.

Fresh donor eggs vs frozen donor eggs

If you go the donor route you will face a second choice: a fresh cycle synchronized with a donor, or a cohort of vitrified eggs from an egg bank.

The CDC surveillance data shows a real gap. In fresh embryo transfers, 55.9% with fresh donor eggs against 46.2% with frozen; in frozen embryo transfers, 45.8% against 41.3% (Braun et al., Fertility and Sterility, 2024). The adjusted relative risk was 0.83 for fresh transfers and 0.94 for frozen transfers, so the disadvantage of frozen donor eggs is smaller once the embryo itself is frozen.

Smaller single-center data is more favorable to vitrification. Kostoglou and colleagues (Cureus, 2025) compared 112 recipients of fresh donor oocytes with 102 recipients of vitrified ones and reported cumulative live birth rates of 69.6% and 66.6%, a difference that was not statistically significant, with 96% oocyte survival after warming. That is one clinic against a national registry of nearly 49,000 transfers. When the two disagree, the registry is the safer planning number and the single-center result shows what a strong laboratory can do.

The parts that are not about odds

The genetic link, and telling the child

A donor-egg child carries the donor's genes, not yours. You carry the pregnancy, and you are the legal and social parent, but the genetic connection is not there. Some people find that loss manageable and some find it decisive, and neither reaction is a miscalculation.

Disclosure is a separate question from the genetics. The ASRM Ethics Committee's opinion Informing offspring of their conception by gamete or embryo donation (Fertility and Sterility, 2018) states that disclosure to donor-conceived people is strongly encouraged, while the choice ultimately rests with the recipient parents. Worth factoring in: consumer DNA testing has made non-disclosure much harder to sustain than it was when these programs were designed.

The law depends on which country you treat in

Donor anonymity is not a medical setting, it is national law, and it differs sharply.

In the United Kingdom, donation is identity-release. The HFEA states that when a donor-conceived person turns 18 they can ask the Authority for the donor's name, date of birth and last known address. UK donors are compensated up to £985 per donation cycle, and the HFEA reports that 1,392 new egg donors registered in 2023, down from 1,495 in 2019.

In Spain, donation is anonymous. Article 5.5 of Ley 14/2006, of 26 May, on assisted human reproduction techniques provides that donation "shall be anonymous" and that donor identity data must be kept confidential. Recipients and donor-conceived children may obtain general, non-identifying information about the donor; identity can be released only in extraordinary circumstances involving a clear danger to the child's life or health, or where criminal procedural law requires it.

That single difference changes what your future child will be able to find out, and it is one of the reasons cross-border donor treatment is not simply a cheaper version of the same thing. Verify the rules for the specific country and clinic before you commit, because these statutes do get amended.

Cost and waiting

There is no current authoritative national price for donor-egg IVF in the United States. The best peer-reviewed US figure remains Katz and colleagues' 18-month prospective cohort (Fertility and Sterility, 2011), which found a median per-person cost of $38,015 for IVF with donor eggs against $24,373 for standard IVF. That is 2011 data and today's prices are higher, so treat it as a ratio rather than a quote: donor-egg IVF ran roughly 1.6 times a standard IVF cycle. For comparison, our cost breakdown puts a realistic own-egg freezing program at $30,000 to $45,000 before you ever thaw.

Waiting is the cost people underestimate. The HFEA says the UK donation process takes around two to three months from a donor's first contact with a clinic to egg collection, and the supply is not evenly distributed: of roughly 1,392 new UK egg donors in 2023, about 1,070 were White, against approximately 55 Black and 60 Asian donors. If you are matching for ethnic background outside the largest donor pool, the wait can be considerably longer than the headline process time.

How to hold the decision

The honest summary of egg freezing vs donor eggs is that the two options are not competing on the same axis. Your own frozen eggs buy a genetic link at a probability whose ceiling was set by your age at retrieval and which no clinic can reset. Donor eggs buy a substantially higher and more stable probability, at the price of that genetic link, a different legal framework depending on country, and a set of disclosure decisions that will outlast the treatment.

What the data supports is narrow and specific: after about 40, and unambiguously after 42, the number of your own eggs the model requires climbs past what retrieval can deliver, while donor-egg outcomes hold near 46% to 56% per transfer in US registry data and above 30% per embryo transferred in UK data. What the data cannot tell you is how much the genetic link is worth to you. That part is not a statistics problem, and anyone who presents it as one, in either direction, is selling something.

These figures are population averages and model estimates, not predictions for you. Your ovarian reserve, your clinic's laboratory, and your country's donor law will all move the numbers. Work through them with a board-certified reproductive endocrinologist who is willing to give you both sets of odds in the same conversation.