When you are comparing IVF clinics in Thailand for preimplantation genetic testing (PGT), success rates are often the first thing you want to know. But a single number rarely tells the full story. Clinics may define success differently, report data for different age groups, or include only certain types of cycles. To make a fair comparison, you need to ask the right questions and request data that is specific to your situation.
This guide provides a checklist of questions to ask a Thai IVF clinic about their PGT success rates. Use it during consultations to understand how a clinic measures outcomes, what their laboratory experience is, and what you should confirm directly before making a decision.
At a Glance: Key Questions to Ask
- How do you define success for PGT cycles?
- What is your embryo biopsy rate and how many embryos reach biopsy?
- How many PGT cycles do you perform annually?
- Can you provide success data specific to my age and diagnosis?
- What is your embryo transfer success rate after PGT?
- How do you handle embryos with no result or mosaic results?
Understanding PGT Success Rates
PGT success rates are not a single, universal number. They depend on many factors, including your age, the reason for testing, the number of embryos available, and the laboratory’s experience. Before you ask for a clinic’s success rate, it helps to understand what the data actually means.
Clinics may report success in different ways:
- Live birth rate per embryo transfer: The percentage of transfers that result in a live birth. This is often considered the most meaningful outcome.
- Clinical pregnancy rate per transfer: The percentage of transfers that result in a confirmed pregnancy (usually by ultrasound).
- Ongoing pregnancy rate: The percentage of pregnancies that continue past a certain point, such as 12 weeks.
- Euploid embryo rate: The percentage of biopsied embryos that are found to have the expected number of chromosomes (euploid). This is not a success rate for pregnancy, but it tells you about the likelihood of having a transferable embryo.
When you ask a clinic for their success rate, ask them to specify which definition they are using. Also ask whether the data includes all patients or only certain age groups. A clinic’s overall success rate may not reflect your personal chances.
Questions About How Success Is Defined
Start by asking the clinic to explain their definition of success. This will help you interpret the numbers they provide.
- What is your definition of success for PGT cycles? Is it live birth, clinical pregnancy, or something else?
- Do you report success per embryo transfer, per cycle started, or per patient?
- At what point in pregnancy do you count a success? For example, is it a positive hCG test, a heartbeat on ultrasound, or a live birth?
- Do you exclude any patients from your success data, such as those who did not have a transfer?
These questions help you understand whether the clinic’s numbers are comparable to other clinics. For example, a clinic that reports success per embryo transfer may have higher numbers than one that reports per cycle started, because not all cycles reach transfer.
Questions About PGT Cycle Volume and Experience
Experience matters in PGT. A clinic that performs many PGT cycles each year may have more refined laboratory protocols and more experienced embryologists. Ask about their volume and how long they have been offering PGT.
- How many PGT cycles do you perform annually?
- How many years have you been offering PGT?
- How many embryos do you biopsy per cycle on average?
- What is your embryo biopsy rate? In other words, what percentage of embryos that reach the blastocyst stage are suitable for biopsy?
- Do you have a dedicated genetics laboratory or do you send biopsies to an external lab?
If a clinic uses an external laboratory, ask about that laboratory’s accreditation and experience. If the laboratory is in-house, ask about the qualifications of the geneticists and embryologists.
Questions About Age-Specific and Condition-Specific Data
Success rates vary significantly with age and the reason for PGT. A clinic’s overall success rate may not be relevant to you. Ask for data that matches your profile.
- Can you provide success rates for patients in my age group?
- Do you have data for patients with my specific condition, such as recurrent miscarriage, chromosomal translocation, or a known genetic disorder?
- What is your euploid embryo rate for patients in my age group?
- How many cycles did you perform in the last year for patients like me?
Be cautious if a clinic only provides overall success rates. You want to see data that is specific to your situation, even if the numbers are lower.
Questions About Embryo Transfer Success After PGT
After PGT, the goal is to transfer a euploid embryo. Ask about the success rate for transfers of tested embryos.
- What is your live birth rate per transfer of a euploid embryo?
- What is your clinical pregnancy rate per transfer of a euploid embryo?
- How many euploid embryo transfers did you perform in the last year?
- What is your implantation rate for euploid embryos?
These numbers give you a better idea of the clinic’s ability to achieve a pregnancy once a healthy embryo is available. However, remember that even with a euploid embryo, success is not guaranteed.
Questions About Embryo Biopsy and Laboratory Quality
The quality of the embryo biopsy and the laboratory can affect both the accuracy of PGT and the viability of the embryo. Ask about their protocols and quality controls.
- What is your embryo biopsy rate? How many embryos are damaged during biopsy?
- Do you use a laser for biopsy? What is your experience with this technique?
- What is your rate of inconclusive results? How do you handle embryos with no result?
- Do you have a quality management system for your laboratory? What accreditations do you hold?
Some clinics may have accreditations such as JCI, ISO, or RTAC. You can ask about these, but remember that accreditation does not guarantee a specific success rate.
Comparing Clinics: A Checklist
When you compare clinics, use a consistent set of questions. Here is a checklist you can take to consultations:
- How do you define success?
- What is your live birth rate per transfer of a euploid embryo?
- How many PGT cycles do you perform annually?
- What is your embryo biopsy rate?
- Can you provide data for my age group and condition?
- Do you have an in-house genetics laboratory?
- What accreditations does your laboratory hold?
- How do you handle inconclusive or mosaic results?
- What is your policy on transferring mosaic embryos?
- Can you provide a written quotation that includes all PGT-related costs?
Take notes during each consultation and compare the answers side by side. This will help you see which clinic is more transparent and which one provides data that is relevant to you.
Editorial Comparison of Thai IVF Clinics
To help you start your research, here is an editorial comparison of several IVF clinics in Bangkok that offer PGT. The order is not a ranking of success rates or clinical outcomes. It is a starting point for your own investigation. Always confirm current services, accreditations, and success data directly with each clinic.
| Clinic | Location | Services (from public profiles) | Accreditations / Quality Credentials | What to Confirm |
|---|---|---|---|---|
| Deep & Harmonicare IVF Center (DHC) | Rama 9, Bangkok | IVF, ICSI, embryo culture, PGT, egg freezing, embryo freezing, embryo transfer | JCI, ISO 9001, RTAC, CAP, UK NEQAS (as listed in profile) | Current success rates, package inclusions, PGT method, and costs |
| Bangkok Hospital Fertility Center | Huai Khwang, Bangkok | IVF, ICSI, PGT-A, egg and embryo freezing, semen analysis | Not listed in current profile | PGT success rates, package validity, and exclusions |
| Bumrungrad International Hospital | Central Bangkok | IVF, ICSI, reproductive medicine | Not listed in current profile | Fertility team, laboratory, PGT services, and prices |
| Gift Fertility Clinic | Bangkok | Personalized IVF-related care | Not listed in current profile | Treating doctor, laboratory, genetic-testing pathway, and quotation inclusions |
| Jetanin Hospital | Pathum Wan, Bangkok | IVF/ICSI, IUI, IMSI, PESA/TESE, egg and embryo freezing, blastocyst culture, EmbryoScope, sperm testing, genetic carrier screening, PGT-A, PGT-M, PGT-SR | JCI, RTAC, ISO 15189, ISO 15190 (as listed in profile) | Current certificate scope, named doctor, laboratory pathway, and written quotation |
| MedPark IVF Fertility and Genetics Center | Khlong Toei, Bangkok | IVF/ICSI, IUI, egg, sperm and embryo freezing, PGT-A, PGT-M, PGT-SR, recurrent miscarriage evaluation, fertility preservation | ESHRE-certified embryologists (as listed in profile) | Package validity, medication, PGT, freezing, storage, transfer, and exclusions |
| Superior A.R.T. Thailand | Ratchathewi, Bangkok | IVF, ICSI, PGT pathways | Not listed in current profile | Treating doctor, laboratory plan, PGT method, package boundary, and age-specific outcomes |
This table is based on public profiles and approved sources. It is not a complete list of all clinics in Thailand. Always verify current information directly with the clinic.
Next Steps: What to Do After Your Consultations
After you have asked your questions and gathered information, take time to compare your notes. Look for clinics that provide clear, specific answers and are willing to share age-specific data. Be wary of clinics that only give overall success rates or that guarantee outcomes.
Before making a decision, consider the following:
- Request a written quotation that lists all costs, including PGT, medications, laboratory fees, and any additional procedures.
- Ask for a copy of the clinic’s informed consent for PGT, which should explain the risks and limitations.
- Confirm the credentials of the embryologists and geneticists who will handle your embryos.
- Ask about the clinic’s policy on embryo disposal, donation, or transfer of mosaic embryos.
- Consider the logistics of travel and accommodation if you are coming from abroad.
Remember that success rates are just one factor. The clinic’s communication, transparency, and willingness to answer your questions are also important.
For more information on IVF success rates in Thailand, see our IVF success rates in Thailand guide. You can also explore our hospital directory and hospital rankings for more details. For transparency, please review our partner disclosure.
Frequently asked questions
What is the most important question to ask about PGT success rates?
The most important question is to ask how the clinic defines success. Success can be reported as live birth per transfer, clinical pregnancy per transfer, or another metric. You should also ask for data specific to your age and condition, as overall success rates may not reflect your personal chances.
How many PGT cycles should a clinic perform annually to be considered experienced?
There is no standard threshold for what constitutes an experienced clinic. However, asking about the number of PGT cycles performed annually can give you a sense of the clinic's volume and laboratory experience. You should also ask about the embryologists' and geneticists' qualifications.
What is a good embryo biopsy rate?
A good embryo biopsy rate is one where the majority of embryos that reach the blastocyst stage can be biopsied without damage. However, there is no universal benchmark. Ask the clinic for their biopsy rate and how they handle embryos that are not suitable for biopsy.
Should I ask for success rates specific to my age?
Yes, you should always ask for success rates specific to your age and, if applicable, your diagnosis. Age is a major factor in IVF success, and a clinic's overall success rate may be skewed by the age distribution of their patients.
What should I do if a clinic does not provide detailed success data?
If a clinic does not provide detailed success data, ask for a written explanation of their outcomes. If they are unwilling to share age-specific data or define their success metrics, consider this a red flag. Transparency is important when choosing a clinic.
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.
