Surrogacy Success Rates in Mexico City

What are surrogacy success rates?

Gestational surrogacy has some of the strongest outcomes in reproductive medicine. In general, published data show that roughly 60% of first embryo transfers to a gestational carrier result in pregnancy, and with donor eggs the live birth rate per transfer typically falls between about 60% and 70%, rising to 75% to 80% when a chromosomally tested (PGT-A) embryo is transferred. A large 2023 analysis even found that gestational carrier cycles had a higher adjusted live birth rate than standard IVF.

Two cautions matter, though. These are general figures from the wider field, not a promise about your cycle, and the single biggest driver is not the surrogate at all; it is the age of the eggs. Below we explain what actually moves the number, so you can read any clinic's success rate, including ours, with a clear eye.

What actually drives surrogacy success

The age of the eggs

This is the single most important factor. Eggs from a woman in her twenties or early thirties, whether an intended mother or a donor, produce far more viable embryos than older eggs. It is why donor egg journeys post such high numbers, and why the surrogate's own age has little effect: she is not providing the egg.

Embryo quality and PGT-A

Transferring a chromosomally normal embryo raises the odds sharply, especially for older intended mothers. Preimplantation genetic testing (PGT-A) does not create more healthy embryos, but it avoids transferring ones that were never going to succeed, which is why per-transfer rates climb to the 75% to 80% range. You can read how it works on the PGT-A page.

A screened, proven carrier

Carriers in the program are medically and psychologically screened and must have had at least one healthy pregnancy of their own. A proven uterus is a real advantage, and it is part of why gestational surrogacy can outperform standard IVF in the same age group.

Why cumulative success matters more than one transfer

A single-transfer percentage can be misleading. What matters to you is the chance of a baby across the whole journey, and that is usually higher, because a stimulation cycle often produces several embryos. If the first transfer does not succeed, a frozen embryo can be transferred without repeating the full cycle, so the odds accumulate with each attempt.

This is why the size of the egg package can matter for donor egg journeys: more eggs tend to mean more embryos, and more chances from one cycle. Dr. Castillo Peláez plans the number of embryos and transfers with your situation in mind, and if a cycle does not work, he reviews it and adjusts before the next step.

How to read a clinic's success rate honestly

A high headline number is easy to publish and hard to interpret. A clinic can raise its rate by only treating straightforward cases, by quoting pregnancy rather than live birth, or by counting per transfer rather than per patient. So the useful question is never just what is your success rate, but success at what, measured how, and for whom.

We would rather earn your trust than win it with a number. During your free consultation, Dr. Castillo Peláez looks at your eggs or your chosen donor, your embryos, and your history, and gives you an honest, realistic estimate for your case, along with what would improve it. If your odds would be low, he will tell you, and he will explain when donor eggs meaningfully change the picture. You can see how this fits the wider journey on the surrogacy program page, or reach Michaël to start.

Common questions about surrogacy success rates

Does the surrogate's age affect success?

Very little. Because she does not provide the egg, her age has minimal impact on whether a transfer succeeds. What matters is the age of the eggs and the quality of the embryo. A carrier's own healthy pregnancy history does help, which is why the program screens for it.

Do donor eggs improve the success rate?

Usually yes, when egg age or quality is the limiting factor. Donor eggs come from young, screened women, which is why donor egg journeys report live birth rates per transfer in the 60% to 70% range, and higher with PGT-A. For intended mothers over 40 in particular, it can be the single biggest change.

What are the odds if the first transfer fails?

They stay strong. If viable embryos were frozen, another transfer can be scheduled without repeating the full stimulation cycle, and the chance of a baby accumulates across attempts. Dr. Castillo Peláez reviews each cycle and adjusts the plan before the next transfer.

Does the clinic publish a guaranteed success rate?

No, because a single number cannot honestly represent every situation, and no one can guarantee an outcome in reproductive medicine. Dr. Castillo Peláez gives you a realistic estimate for your specific case during the consultation, based on your eggs or donor, your embryos, and your history.