At a glance
Comparing IVF success rates across Thai clinics? Learn what questions to ask about how rates are calculated, reported, and what they really mean for your situation.
When comparing IVF clinics in Thailand, success rates are often the first number you look at. But not all success rates are calculated the same way. A clinic’s reported success rate can vary significantly depending on the patient population, embryo transfer policies, and whether preimplantation genetic testing (PGT) is included. To make a fair comparison, you need to ask specific questions about how the data is gathered and presented. This guide provides a checklist of questions to help you interpret success rate data and avoid misleading comparisons.
At a Glance: Key Questions to Ask
- What age groups are included in the success rate data?
- Are success rates based on fresh or frozen embryo transfers?
- Is PGT included in the reported success rates?
- How is “success” defined—clinical pregnancy, live birth, or something else?
- What is the clinic’s policy on single vs. multiple embryo transfer?
- How many cycles are included in the data, and over what time period?
Why Success Rate Reporting Varies
Success rates are not a single, universal number. They depend on many factors, including patient age, the cause of infertility, and the clinic’s treatment protocols. In Thailand, as in many countries, there is no standardized reporting system, so clinics may calculate and present their data differently. This makes it essential to ask detailed questions before drawing conclusions.
Questions About Patient Demographics
Success rates are heavily influenced by the age of the woman undergoing treatment. A clinic that treats a younger patient population will naturally have higher success rates. Ask:
- What are the success rates broken down by age group (e.g., under 35, 35-37, 38-40, over 40)?
- Are the rates based on your own age and diagnosis?
- Does the clinic report outcomes for patients with similar medical histories to yours?
Questions About Embryo Transfer Policies
The number of embryos transferred affects success rates. Clinics that routinely transfer multiple embryos may report higher pregnancy rates per cycle, but this also increases the risk of multiple pregnancies. Ask:
- Does the clinic typically transfer one embryo or multiple embryos?
- Are success rates reported per embryo transfer or per cycle started?
- What is the clinic’s policy on elective single embryo transfer (eSET)?
Questions About PGT and Genetic Testing
Preimplantation genetic testing (PGT) can improve the chance of a successful pregnancy by selecting embryos with normal chromosomes. However, not all patients use PGT, and its inclusion can affect reported success rates. Ask:
- Are the success rates for cycles with PGT reported separately from those without?
- What types of PGT are offered (e.g., PGT-A, PGT-M)?
- How does PGT affect the clinic’s reported success rates?
Questions About How Success Is Defined
“Success” can mean different things. Some clinics report clinical pregnancy (a heartbeat seen on ultrasound), while others report live birth rates. Live birth is the most meaningful outcome for patients. Ask:
- Does the reported success rate refer to clinical pregnancy or live birth?
- Are miscarriage rates reported?
- How are multiple pregnancies counted?
Questions About Data Reliability
The reliability of success rate data depends on the sample size and time period. Small numbers can be misleading. Ask:
- How many cycles are included in the data?
- Over what time period was the data collected?
- Is the data audited or verified by an external body?
Questions About Your Specific Situation
Ultimately, success rates are population statistics, not predictions for your individual case. Ask the clinic to explain how your specific circumstances might affect your chances:
- Based on my age, diagnosis, and medical history, what is a realistic success rate for me?
- What is the clinic’s approach to treatment if the first cycle is unsuccessful?
- Are there any additional tests or procedures that might improve my chances?
Next Steps: What to Do With This Information
Once you have gathered answers to these questions, you can make a more informed comparison. Remember that success rates are just one factor in choosing a clinic. Consider the clinic’s experience, laboratory standards, and the comfort you feel with the medical team. Use the answers to ask follow-up questions and request written information where possible.
For more guidance, explore our IVF success rates in Thailand overview, visit our FAQ section, or read our guides for more detailed information. If you have specific questions, feel free to contact us.
Frequently asked questions
Why do IVF success rates vary so much between Thai clinics?
Success rates vary because clinics report different patient populations, use different embryo transfer policies, and may or may not include PGT. There is no standardized reporting system in Thailand, so it's important to ask how each clinic calculates its rates.
What is the most important success rate to look at?
Live birth rate per cycle or per embryo transfer is generally the most meaningful outcome. However, it's important to look at rates broken down by age group and to understand whether the data includes PGT cycles.
Should I compare success rates from different clinics directly?
Direct comparison can be misleading if the clinics report different definitions of success, patient demographics, or embryo transfer policies. Ask for detailed breakdowns and consider your own circumstances before comparing.
How can I verify a clinic's success rate data?
Ask the clinic for detailed data, including the number of cycles, time period, and definitions used. Some clinics may have their data audited by external bodies, but this is not always the case. You can also ask for patient testimonials or independent reviews.
Continue your research
Medical information notice: This article is educational and does not replace individual assessment, diagnosis, genetic counselling or treatment advice from a licensed clinician. Provider services, availability, fees and policies should be verified directly before booking.
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