There is no single honest surrogacy success-rate number that applies to every intended parent. Outcomes depend on embryo quality, egg age at retrieval, uterine lining, embryo transfer difficulty, clinic history, surrogate medical review, and individual medical facts.
Why one percentage can mislead
SART explains IVF success through multiple factors, including the egg source age at retrieval, the endometrium, the embryo, and embryo transfer. It also warns that patient characteristics vary among clinics, so statistics should not be used as a simple clinic-to-clinic comparison for one person's chance.
A surrogacy agency should not turn that complexity into a guaranteed outcome claim.
What affects a gestational surrogacy outcome
Important factors can include:
- Embryo quality and testing history, if any.
- Age of the egg source at retrieval.
- Sperm factors and embryo-development history.
- Whether embryos are frozen or fresh.
- The surrogate's uterine evaluation and pregnancy history.
- Transfer protocol and clinic experience.
- Number of embryos transferred.
- Medical, obstetric, and pregnancy complications.
- Whether the first transfer works or additional transfers are needed.
The clinic is the right source for medical probability estimates.
What to ask the fertility clinic
- What embryo-specific factors matter in our case?
- How does egg-source age affect our estimate?
- How many usable embryos do we have?
- What does our embryo grading or testing mean?
- What is the recommended transfer plan?
- What would make the clinic cancel or delay transfer?
- How should we think about cumulative chances over multiple transfers?
What to ask the agency
Ask the agency about screening, match fit, surrogate availability, communication, and coordination. Ask the clinic about medical odds. The agency may help organize the process, but it should not replace a physician's analysis of your embryos, transfer plan, or medical history.
How to plan emotionally and financially
Because no transfer is guaranteed, intended parents should plan for uncertainty. Ask what happens after a failed transfer, whether another embryo is available, how compensation or expense provisions work, whether the clinic recommends another evaluation, and how the team communicates next steps.
Planning for uncertainty is not pessimism. It is how families avoid being surprised by common decision points.
What not to ask an agency to promise
Do not ask the agency to guarantee implantation, pregnancy, birth, or a specific number of transfers. Those are medical outcomes. A responsible agency can explain process controls: screening, records, match fit, communication, legal handoff, and coordination. The clinic explains medical probability and treatment options.
How to use SART data carefully
SART data can help you understand IVF factors and clinic reporting, but it should be interpreted with your doctor. Ask whether your embryos, donor age, transfer plan, and history fit the population behind a statistic. If they do not, the public number may be less helpful than a clinic-specific discussion.
Next steps
- Surrogacy cost guide
- Find a surrogate
- How a surrogate becomes pregnant through IVF
- Schedule a consultation
This page is educational information only and is not medical advice. Ask your fertility clinic for estimates based on your embryos and medical history.