Not all rates are the same
Pregnancy rate, clinical pregnancy rate, live birth rate, and cumulative success rate can mean different things. Patients should ask which measure is being discussed.
A single number may not apply equally to every age group or diagnosis.
What changes the outlook
Age at egg collection, ovarian reserve, sperm quality, embryo quality, uterine health, previous pregnancy history, and previous treatment response all influence the chance of success.
Frozen embryo transfer results may also depend on the age when the embryo was created, not only the patient’s age at transfer.
Use rates for planning
Success rates should help patients make informed plans, not create false certainty. A specialist can explain realistic expectations.