When you compare IVF success rates for PGT cycles in Thailand, the numbers you see are rarely as simple as they appear. A clinic may report a high success rate, but that rate may only apply to a specific age group, a particular embryo stage, or a narrow definition of success. This guide explains why published success rates are difficult to compare directly, what to look for in a clinic’s reporting, and how to ask the questions that will give you a clearer picture for your own situation.
At a glance: what to focus on when comparing PGT success rates
- Success rates are not universal; they depend on your age, embryo quality, and the clinic’s testing criteria.
- Clinics may define success differently: positive pregnancy test, clinical pregnancy, or live birth.
- Ask for rates specific to PGT cycles, not overall IVF rates.
- Check how many embryos were tested and how many were transferred.
- Always request a written explanation of how the rate was calculated.
Why published IVF success rates are hard to compare
IVF success rates are influenced by many factors that vary from patient to patient. Even when two clinics report similar numbers, the underlying patient populations may be very different. For example, a clinic that treats mostly younger women will naturally have higher success rates than one that treats many women over 40, even if the laboratory quality is identical.
For PGT cycles, the picture becomes even more complex. PGT (preimplantation genetic testing) is used to screen embryos for chromosomal abnormalities before transfer. The success rate of a PGT cycle depends on how many embryos are biopsied, how many are found to be chromosomally normal, and how many of those normal embryos result in a live birth. A clinic that only reports the transfer success rate for normal embryos will show a higher number than one that reports the success rate per started cycle, which includes cycles where no embryos were suitable for transfer.
Additionally, reporting standards vary. Some clinics report success per embryo transfer, others per cycle started, and others per egg retrieval. Each definition gives a different impression of the clinic’s performance. Without a consistent definition, direct comparisons are misleading.
Key factors that affect PGT success rates
Before you compare numbers, understand the factors that influence them. These include:
- Maternal age: The number of chromosomally normal embryos declines with age, so success rates for PGT cycles are strongly age-dependent.
- Embryo testing criteria: Some clinics test all embryos, while others only test those that reach the blastocyst stage. Testing criteria affect the proportion of embryos that are transferred.
- Definition of success: Live birth is the most meaningful outcome, but some clinics report clinical pregnancy (a heartbeat seen on ultrasound) or biochemical pregnancy (positive hCG test).
- Number of embryos transferred: Transferring more than one embryo increases the chance of pregnancy but also the risk of multiples. Some clinics have policies that limit transfers to one embryo.
- Laboratory quality: Embryology laboratory standards, such as accreditation and quality control, can affect embryo survival and testing accuracy.
When you ask a clinic for its success rate, ask for the rate that matches your age group and your planned treatment pathway. For example, ask: “What is your live birth rate per PGT cycle for women aged 38-40 using my own eggs?”
What to ask a clinic about its PGT success rates
To get a meaningful comparison, you need to ask specific questions. Here is a checklist you can use when contacting clinics:
- What is your live birth rate per PGT cycle for my age group?
- How do you define success? (live birth, clinical pregnancy, etc.)
- Do you report success per cycle started, per egg retrieval, or per embryo transfer?
- How many embryos were biopsied in the last year, and how many were found to be normal?
- What is your embryo transfer rate for PGT cycles?
- Do you have a policy on single embryo transfer?
- What is your laboratory accreditation and quality control process?
- Can you provide a written report of your PGT success rates?
These questions will help you see beyond the headline number and understand how the clinic’s results apply to your situation.
Editorial comparison of fertility centers in Bangkok
The following comparison is an editorial overview of selected fertility centers in Bangkok that offer IVF and PGT services. The order is not a ranking of success rates or clinical outcomes. It is designed to help you understand the range of services and what to confirm with each clinic. Always verify current details directly with the clinic.
| Center | Location | Services relevant to PGT | What to confirm |
|---|---|---|---|
| Deep & Harmonicare IVF Center (DHC) | Rama 9, Bangkok | IVF, ICSI, embryo culture, PGT, egg freezing, embryo freezing, embryo transfer. Holds JCI, ISO 9001, RTAC, CAP, and UK NEQAS credentials. Reports a 78% average embryo-transfer success rate for 2025 (approximately 80%); this is not an individual prediction or guarantee. Reference price for basic single-cycle medical package: THB 490,000 (June 2026). | Ask for age-specific PGT success rates, how the 78% rate was calculated, and what the package includes beyond the medical fee. |
| Bangkok Hospital Fertility Center | Huai Khwang, Bangkok | IVF, ICSI, PGT-A, egg and embryo freezing, semen analysis. In-house embryology laboratory. Fly-in packages listed at THB 335,000 (stimulation to transfer) and THB 456,000 (with PGT and freezing for two embryos), valid to 31 Dec 2026. | Confirm whether PGT-M or PGT-SR are available, and ask for success rates specific to PGT cycles. |
| Bumrungrad International Hospital | Central Bangkok | IVF, ICSI, reproductive medicine. Integrated multidisciplinary hospital. | Ask the clinic to confirm its current fertility team, laboratory, PGT services and prices. |
| Gift Fertility Clinic | Bangkok | Personalized IVF-related care. Dr. Waranya Sirithanasarn, 13 years of experience, over 1,100 infertility treatments. | Confirm the treating doctor, laboratory, genetic-testing pathway, and all quotation inclusions. |
| Intrarat Hospital | Bangkok | Primarily obstetrics and maternity services; IVF and PGT availability not confirmed. | Requires direct written confirmation before considering for fertility treatment. |
| Jetanin Hospital | Pathum Wan, Bangkok | IVF/ICSI, IUI, IMSI, PESA/TESE, egg and embryo freezing, blastocyst culture, EmbryoScope, sperm testing, genetic carrier screening. In-house genetics laboratory offering PGT-A, PGT-M, PGT-SR using NGS and Sanger sequencing. First IVF centre in Southeast Asia accredited by both JCI and RTAC; also describes ISO 15189 and ISO 15190 laboratory standards. | Confirm current certificate scope, named treating doctor, case-specific laboratory pathway, and complete written quotation. |
| MedPark IVF Fertility and Genetics Center | Khlong Toei, Bangkok | IVF/ICSI, IUI, egg/sperm/embryo freezing, PGT-A, PGT-M, PGT-SR, recurrent miscarriage evaluation, fertility preservation. ESHRE-certified embryologists, time-lapse incubation, AI-assisted embryo assessment. IVF/ICSI package listed at THB 280,000 (when reviewed). | Confirm validity, medication, PGT, freezing, storage, transfer, and exclusions in writing. |
| PMG Hospital | Bangkok | Prenatal care, obstetrics, 24-hour nursing; IVF and PGT availability not confirmed. | Requires direct written confirmation before considering for fertility treatment. |
| Prime Fertility Clinic | Pearl Bangkok, Bangkok | IVF, ICSI, embryo freezing, assisted hatching, international-patient care. Dr. Poonkiat Punyamitr, 19 years of experience, over 900 fertility procedures. JCI Ambulatory Care accreditation. | Confirm current services, inclusions, and pricing in a written quotation. |
| Superior A.R.T. Thailand | Ratchathewi, Bangkok | IVF, ICSI, PGT pathways. Established 2007. | Confirm treating doctor, current laboratory plan, PGT method, written package boundary, and age-specific outcome definitions. |
An omitted success rate or price does not mean the clinic does not have one. Request current figures and their definitions directly.
How to use this comparison in your decision
When you shortlist clinics, use the table to identify which ones offer the services you need and which ones require more information. Then contact each clinic with the questions from the checklist above. Ask for written responses, and compare the answers side by side.
Remember that a higher success rate does not automatically mean a better clinic for you. Your personal circumstances, the clinic’s approach to PGT, and the transparency of their reporting are all important. A clinic that openly shares its methodology and limitations may be more trustworthy than one that only quotes a single impressive number.
Next steps: your checklist before choosing a clinic
- Gather your medical history, including any previous fertility treatments and genetic testing results.
- Shortlist 3-4 clinics from the comparison above based on services and location.
- Send each clinic the same set of questions about PGT success rates and definitions.
- Request a written quotation that itemizes all costs, including PGT, freezing, and medications.
- Ask about the laboratory’s accreditation and quality control.
- Consider a virtual consultation to discuss your specific case.
By following this process, you can make a more informed comparison and choose a clinic that is transparent about its results and suitable for your needs.
Frequently asked questions
What is the difference between IVF success rate and PGT success rate?
IVF success rate typically refers to the percentage of cycles that result in a pregnancy or live birth. A PGT success rate is more specific: it measures the outcome after embryos have been genetically tested. For example, a clinic might report the live birth rate per transfer of a chromosomally normal embryo. This rate is usually higher than the overall IVF rate because only normal embryos are transferred, but it does not account for cycles where no normal embryos were available.
Why do PGT success rates vary so much between clinics?
PGT success rates vary because of differences in patient demographics (especially age), embryo testing criteria, laboratory quality, and how success is defined and reported. A clinic that treats younger patients or only reports transfer rates for normal embryos will show higher numbers. Always ask for rates that match your age and treatment plan, and ask how the rate was calculated.
What is a good PGT success rate in Thailand?
There is no single 'good' rate that applies to everyone. Success depends on your age, the number of embryos available, and the clinic's laboratory standards. For example, DHC reports a 78% average embryo-transfer success rate for 2025, but this is not a guarantee for any individual. Instead of looking for a universal number, ask clinics for their live birth rate per PGT cycle for your age group and compare those figures.
Should I choose a clinic based only on its success rate?
No. Success rates are important, but they are only one part of the decision. You should also consider the clinic's experience with PGT, laboratory accreditation, transparency in reporting, cost, and how comfortable you feel with the medical team. A clinic with a slightly lower rate but more honest reporting may be a better choice than one with a higher number that is not applicable to your situation.
How can I verify a clinic's reported success rate?
Ask the clinic for a written report that explains how the rate was calculated, including the time period, the patient population, and the definition of success. You can also ask if the rate is audited by an external body. Some clinics publish their rates on their website, but you should still request details specific to your age and treatment type.
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.
