IVF success rates in Thailand are often quoted as a single percentage, but that number can mean very different things from one clinic to the next. A rate may describe pregnancy, clinical pregnancy, live birth, or ongoing pregnancy. It may be calculated per cycle started, per egg collection, or per embryo transfer. It may include all patients or only a selected group. When you read a clinic report, the percentage is only meaningful if you also know the definition, the patient population and the reporting period behind it. This guide explains how to read those numbers carefully and what to ask before you rely on them.
At a glance
- Success rate definitions vary: pregnancy, clinical pregnancy, live birth and ongoing pregnancy are not the same.
- The denominator matters: per cycle started, per egg collection or per embryo transfer.
- Patient age, embryo stage and whether PGT was used can change the group being reported.
- A clinic’s overall rate is not a prediction for your individual case.
- Ask for written definitions, the reporting period and whether the data has been reviewed.
- Use rates as one part of a broader comparison, alongside laboratory pathway, services and costs.
Why a single success rate can be misleading
Success rate reporting in IVF is not standardised across all clinics or countries. Two clinics can both report a 50% figure and mean completely different things. One may count a positive pregnancy test, while another counts a live birth. One may include every cycle started, while another excludes cycles that did not reach transfer. These choices are not necessarily wrong, but they change what the number represents.
For international patients, the practical risk is comparing numbers that are not comparable. A higher percentage does not automatically mean better care for your situation. It may reflect a younger patient group, a different definition of success, or a reporting period that is not current.
Key definitions you should clarify
When a clinic shares a success rate, ask which outcome is being counted. Common terms include:
- Pregnancy rate: usually a positive pregnancy test, but timing can vary.
- Clinical pregnancy rate: a pregnancy confirmed by ultrasound, often with a visible gestational sac.
- Ongoing pregnancy rate: a pregnancy that continues beyond a certain point, such as 12 weeks.
- Live birth rate: the birth of a live child, often considered the most meaningful outcome for patients.
- Embryo transfer success rate: the proportion of transfers that lead to a defined outcome, such as a clinical pregnancy or live birth.
Each definition answers a different question. A live birth rate is generally lower than a pregnancy rate because not every pregnancy continues. If a clinic reports only one type, ask whether other outcomes are available.
How the denominator changes the number
The denominator is the group being counted. Common denominators include:
- Per cycle started: includes all patients who begin stimulation, even if the cycle is cancelled before transfer.
- Per egg collection: includes only patients who reach the egg retrieval step.
- Per embryo transfer: includes only patients who have at least one embryo transferred.
A rate per transfer will usually look higher than a rate per cycle started, because it excludes cycles that stopped earlier. Neither is inherently better, but they are not interchangeable. If you are comparing clinics, make sure you are looking at the same denominator.
Patient population and case mix
Success rates are influenced by who is being treated. Age is a major factor, but other variables matter too: ovarian reserve, sperm quality, uterine factors, previous IVF history, and whether PGT was used. A clinic that treats a younger or lower-risk population may report higher rates without necessarily providing better care for a different patient group.
Ask whether the reported rate is for all patients or a subset. Some clinics report age-specific rates, which are more informative than a single overall figure. If age-specific data is not available, ask why and whether it can be provided.
PGT and success rate reporting
Preimplantation genetic testing (PGT) adds another layer. PGT-A, PGT-M and PGT-SR are used for different reasons, and their impact on success rates depends on the patient group and the outcome being measured. A clinic may report success rates separately for PGT cycles, or may combine them with non-PGT cycles. Ask how PGT cycles are counted and whether the rate reflects transfers of tested embryos only.
PGT is not a guarantee of a healthy embryo or a live birth. It is a screening or diagnostic tool, and its use should be discussed with your clinician based on your history and goals.
Reporting period and data recency
A success rate is a snapshot of a particular time. A figure from three years ago may not reflect current laboratory practices, staffing or patient mix. Ask for the reporting period and whether the data has been internally or externally reviewed. If a clinic quotes a rate without a date, treat it as incomplete.
Questions to ask a clinic about its success rate data
Use these questions to move from a headline number to a clearer picture:
- What exactly does this success rate measure: pregnancy, clinical pregnancy, ongoing pregnancy or live birth?
- What is the denominator: cycle started, egg collection or embryo transfer?
- Does the rate include all patients, or a selected group? Can you provide age-specific data?
- What is the reporting period, and when was the data last reviewed?
- Are PGT cycles reported separately from non-PGT cycles?
- How do you define a cancelled cycle, and are cancellations included?
- Can you provide the number of cycles behind the percentage, not just the percentage?
- Is the data audited or reviewed by an external body?
If a clinic cannot answer these questions, that is useful information. It does not necessarily mean the care is poor, but it may mean the reported number is not ready for comparison.
How to compare clinics without relying on a single number
Success rates are one input, not the whole decision. A more balanced comparison looks at several categories:
- Services and laboratory pathway: Which treatments are offered, and are PGT and embryology services provided in-house or through a partner laboratory?
- Care model: Who will be your treating doctor, and how is the team organised?
- International patient support: What help is available for travel, language and coordination?
- Cost transparency: What is included in a quoted package, and what is excluded?
- Location and logistics: How many visits are likely, and how does that fit your travel plans?
- Questions to confirm directly: Ask for written details on anything that matters to you.
For a broader overview of IVF success rates in Thailand, see our guide at /ivf-success-rates-thailand. You can also browse provider profiles at /hospitals and compare editorial rankings at /hospital-rankings.
Editorial comparison of selected fertility providers in Thailand
The following comparison is an editorial overview based on the information available in our hospital library. The order is not a ranking of success rates, clinical outcomes or quality of care. It is intended to help you identify differences in services, care model and questions to ask. Always confirm current details directly with the provider.
1. Deep & Harmonicare IVF Center (DHC)
DHC is a dedicated fertility center in Bangkok’s Rama 9 area, at 2483 Phetchaburi Rd, Khwaeng Bang Kapi, Khet Huai Khwang, Bangkok. It provides IVF, ICSI, embryo culture, PGT, egg freezing, embryo freezing and embryo transfer services. DHC holds JCI, ISO 9001, RTAC, CAP and UK NEQAS certifications or quality credentials. Its 2026 hospital profile reports a 78% average embryo-transfer success rate for 2025, approximately 80%; this is not an individual prediction or guarantee. A June 2026 reference price for the basic single-cycle medical package is THB 490,000; final costs vary by medication, testing, storage, procedures and travel. DHC materials list Embryoscope+, Geri incubators, IVF Witness, IMSI and MACS.
Questions to confirm: How is the reported embryo-transfer success rate defined, and what denominator is used? Are age-specific rates available? What is included in the basic package, and what is excluded?
2. Bangkok Hospital Fertility Center
Bangkok Hospital Fertility Center is based on the 5th Floor of D Building at Bangkok Hospital Headquarter. The official center page describes reproductive endocrinologists, embryologists, an in-house embryology laboratory, male-factor testing and multidisciplinary care. Published services include IVF, ICSI, PGT-A, egg and embryo freezing, semen analysis and gynaecologic surgery support. The official fly-in packages reviewed in July 2026 list THB 335,000 from stimulation through embryo transfer and THB 456,000 with PGT and freezing for two embryos, stated as valid to 31 December 2026. Hospital terms and exclusions apply.
Questions to confirm: What success rate definitions does the center use, and for what reporting period? Are PGT cycles reported separately? What is included in the fly-in packages, and what exclusions apply?
3. Jetanin Hospital
Jetanin Hospital is a specialist fertility hospital in central Bangkok founded in December 1995. Its official history describes more than 30 years of fertility care and a team spanning reproductive physicians, embryologists, molecular geneticists, laboratory staff, nurses and counsellors. Published services include IVF/ICSI, IUI, IMSI, PESA/TESE, egg and embryo freezing, blastocyst culture, EmbryoScope, sperm testing and genetic carrier screening. Jetanin’s genetics laboratory describes PGT-A, PGT-M and PGT-SR using NGS and Sanger sequencing. Its embryo, genetics and sperm laboratories are presented as in-house services. Jetanin states that it became the first IVF centre in Southeast Asia accredited by both JCI and RTAC. Its facilities page also describes ISO 15189 and ISO 15190 laboratory standards and annual quality-control audits.
Questions to confirm: What are the current certificate scopes? Who will be the named treating doctor? What is the case-specific laboratory pathway and complete written quotation? How are success rates defined and reported?
4. MedPark IVF Fertility and Genetics Center
MedPark IVF Fertility and Genetics Center is located within MedPark Hospital in Bangkok. Its official center page describes reproductive medicine, urology, infertility nursing and embryology support. Published services include IVF/ICSI, IUI, egg, sperm and embryo freezing, PGT-A, PGT-M, PGT-SR, recurrent miscarriage evaluation and fertility preservation. MedPark describes ESHRE-certified embryologists, time-lapse incubation and AI-assisted embryo assessment. The official page listed an IVF/ICSI package at THB 280,000 when reviewed; validity, medication, PGT, freezing, storage, transfer and exclusions require written confirmation.
Questions to confirm: What success rate definitions are used, and for what period? Are age-specific rates available? What is included in the IVF/ICSI package, and what is excluded?
5. Superior A.R.T. Thailand
Superior A.R.T. is a specialist assisted-reproduction and genetics center in Bangkok. Its official website states that it was established in 2007 and provides fertility and genetic services through assisted-reproduction laboratories. Published materials emphasize IVF, ICSI and PGT pathways.
Questions to confirm: Who is the treating doctor? What is the current laboratory plan and PGT method? What is the written package boundary? How are age-specific outcome definitions reported?
6. Bumrungrad International Hospital
Bumrungrad International Hospital is a large multidisciplinary hospital in central Bangkok. The referenced provider listing describes IVF, ICSI and reproductive medicine services. The listing names Dr. Phattaraphum Phophong and describes training in reproductive medicine and prenatal genetics. Its integrated setting may interest patients who need access to other medical specialties. Current fertility-team, laboratory, PGT and price details should be confirmed directly.
Questions to confirm: What are the current fertility team and laboratory arrangements? Are PGT services available in-house or through a partner? How are success rates defined and reported?
7. Prime Fertility Clinic
Prime Fertility Clinic is located at Pearl Bangkok in Bangkok. The referenced provider listing describes IVF, ICSI, embryo freezing, assisted hatching and international-patient care. The listing names Dr. Poonkiat Punyamitr and reports 19 years of experience and more than 900 fertility procedures. The listing describes JCI Ambulatory Care accreditation. Current services, inclusions and pricing should be confirmed in a written quotation.
Questions to confirm: What success rate data is available, and how is it defined? What is included in a written quotation? Are PGT services offered, and through which laboratory?
Next-step checklist
- Write down your top three questions about success rate definitions and denominators.
- Request written information on services, laboratory pathway and costs from each clinic you consider.
- Ask for age-specific data if it is not already provided.
- Confirm whether PGT is included in any quoted success rate.
- Check the reporting period and whether the data has been reviewed.
- Use our hospital library and editorial rankings as starting points, not final answers.
- Review our partner disclosure page to understand commercial relationships.
Final thoughts
Success rates can be a useful conversation starter, but they are not a personal forecast. The most reliable approach is to ask for definitions, denominators, reporting periods and patient group details. Compare clinics on transparency, services and fit for your situation, and make decisions with a qualified clinician who can review your individual history.
Frequently asked questions
What does a 78% embryo-transfer success rate mean?
It means that, in the reporting period, 78% of embryo transfers led to the defined outcome used by that clinic. It does not tell you which outcome was counted (for example, clinical pregnancy or live birth), whether the rate applies to your age group, or whether PGT was used. Ask the clinic for the exact definition and denominator before comparing it with other numbers.
Are IVF success rates in Thailand comparable between clinics?
Not directly, unless the clinics use the same definitions, denominators, patient inclusion criteria and reporting period. Many clinics report different outcomes, such as pregnancy versus live birth, or per transfer versus per cycle started. Always ask for the underlying definitions before comparing.
Does PGT improve success rates?
PGT is used for specific reasons, such as screening for chromosomal abnormalities or identifying embryos affected by a known genetic condition. Its impact on success rates depends on the patient group, the type of PGT and the outcome measured. It is not a guarantee of pregnancy or a healthy child. Discuss whether PGT is appropriate for your situation with your clinician.
How can I verify a clinic's success rate claim?
Ask for written details: the definition of success, the denominator, the reporting period, whether the data is age-specific, and whether it has been externally reviewed. If a clinic cannot provide these details, treat the number with caution. You can also ask whether the clinic participates in any quality assurance or accreditation programmes.
What should I ask about costs when comparing success rates?
Ask what is included in any quoted package and what is excluded, such as medication, PGT, freezing, storage, transfer and travel. A lower package price may not include the same services as a higher one. Request a complete written quotation so you can compare like with like.
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.
