Questions to ask about any published rate
Per-cycle, per-transfer, or cumulative?
These measure different things and aren't directly comparable to each other.
Is it age-adjusted?
A blended all-ages rate can obscure your actual likelihood at your specific age.
Is it independently verified or self-reported?
Independent reporting bodies (SART in the US, ESHRE in Europe, RedLARA in Latin America) carry more weight than a clinic's own unverified number.
What population does it reflect?
A clinic that selectively treats favorable-prognosis patients can show inflated rates relative to a clinic treating a broader population.
Why regional reporting bodies matter
Where available, independently verified reporting through a recognized regional body (RedLARA for much of Latin America, including many Colombian clinics) gives you a more reliable data point than an individual clinic's self-reported number alone.
See colombianivf.com for how to request and interpret specific Colombian clinic data.
The Takeaway
Ask these four questions of any success rate you're shown — a number without clear answers to all four isn't yet meaningful for comparison.