When choosing a surrogacy destination, most people immediately look at success rate rankings. But here’s the truth: broad claims like “US 70%, Thailand 60%” don’t tell you much. What matters is whether your cycle will work, not the average. Too many variables are at play—surrogate screening standards, lab embryo culturing capabilities, legal protections—and each one creates gaps in outcomes.
Age Cuts Success Rates in Half at 35
US CDC data shows that for donor egg + surrogacy under age 35, live birth rates hit 75%. Over 40? That drops to 48%. In Thailand, where most surrogacy uses the intended mother’s own eggs, if the egg provider is over 38, even with a healthy surrogate, single-transfer success hovers around 40%. The math is brutal: egg quality deteriorates sharply after 35, and no amount of surrogate optimization can compensate for chromosomal abnormalities in embryos.
How Many Prior Births Should Your Surrogate Have?
US law mandates surrogates must have at least one successful prior delivery, be aged 21-39, and maintain a BMI under 32. Thailand offers surrogacy starting at around ¥300,000 RMB—significantly cheaper—but some agencies only screen surrogates via basic health reports without psychological evaluations. This isn’t just about comfort; surrogates with proven pregnancies have lower miscarriage rates and better uterine receptivity. First-time carriers introduce unnecessary risk, especially when you’re already investing $100,000+ in the process.
What People Who Succeed on the First Try Do Differently
Third-generation IVF with PGT screening is the baseline. Reputable fertility clinics universally use PGT-A technology to eliminate embryos with chromosomal abnormalities. Post-transfer implantation rates reach 65-70% with screened embryos versus 40-45% without. The second commonality: they choose accredited reproductive centers and understand realistic timelines for each stage—no surprises, no false promises. Cheap quotes often hide costs in medication, legal fees, or repeat cycles. The key to avoiding detours is transparency upfront, not the lowest price tag.
Selecting an established fertility center and clarifying every stage’s actual duration is how you avoid expensive mistakes. Don’t chase country rankings—chase verifiable protocols, experienced surrogates, and genetic screening standards that match what you’d expect from top-tier IVF programs.