Why Success Rates Are Not the Whole Story
When you compare IVF hospitals in Thailand, success rates are a natural starting point. But a single percentage can mislead if you do not know how it was calculated. This guide explains how to read hospital-reported success rates, what they do and do not tell you, and how to compare clinics fairly for your own situation.
Success rates in IVF depend heavily on patient age, diagnosis, embryo quality, and laboratory standards. A clinic that reports a high average may treat a younger or less complex patient group. Always ask for the definition behind any number.
At a Glance: Key Points for Comparing IVF Success Rates
- Success rates are not predictions for your individual cycle.
- Check the denominator: per cycle, per embryo transfer, or per patient?
- Age is the biggest factor; compare rates within your age group.
- Ask about the time period and whether the data is audited.
- Look beyond rates: laboratory quality, embryologist experience, and genetic testing options matter.
How Thai Hospitals Report IVF Success Rates
In Thailand, there is no single mandatory public registry for IVF outcomes. Hospitals and clinics publish their own figures, often on their websites or in brochures. These numbers may be based on different definitions, such as:
- Clinical pregnancy rate per embryo transfer
- Live birth rate per cycle started
- Cumulative live birth rate after multiple cycles
Because definitions vary, you cannot directly compare one clinic’s “success rate” with another’s unless they use the same measure. Always ask the clinic to specify exactly what their number represents.
Key Factors That Affect IVF Success Rates
Several patient and clinic factors influence success rates. Understanding these helps you interpret the numbers and ask better questions.
Patient Age
Age is the strongest predictor of IVF success. Most clinics report success rates broken down by age groups, such as under 35, 35-37, 38-40, and over 40. If a clinic only gives an overall average, ask for the age-specific breakdown.
Embryo Quality and Genetic Testing
Embryo quality, often assessed by morphology and genetic screening (PGT), affects implantation chances. Clinics that offer PGT may report higher transfer success rates because they select genetically normal embryos. However, PGT adds cost and does not guarantee a live birth.
Laboratory Standards and Embryology Expertise
The embryology laboratory is the heart of an IVF program. Factors like incubator technology, time-lapse imaging, and the experience of embryologists can influence outcomes. Some Thai hospitals highlight their laboratory accreditations and equipment, but these are not direct success-rate measures.
Editorial Comparison of Thai IVF Hospitals
The following comparison is an editorial overview based on publicly available information. It is not a ranking of success rates or clinical outcomes. The order is for comparison purposes only. Always confirm current details directly with each hospital.
| Hospital | Location | Services | Laboratory / Technology | Accreditations | Questions to Confirm |
|---|---|---|---|---|---|
| Deep & Harmonicare IVF Center (DHC) | Bangkok (Rama 9) | IVF, ICSI, embryo culture, PGT, egg/embryo freezing, embryo transfer | Embryoscope+, Geri incubators, IVF Witness, IMSI, MACS | JCI, ISO 9001, RTAC, CAP, UK NEQAS | Success rate definition, age-specific data, full cost breakdown |
| Bangkok Hospital Fertility Center | Bangkok (Huai Khwang) | IVF, ICSI, PGT-A, egg/embryo freezing, semen analysis, gynecologic surgery support | In-house embryology laboratory | Ask the clinic to confirm. | Success rate data, PGT-A availability, package inclusions |
| Bumrungrad International Hospital | Bangkok (central) | IVF, ICSI, reproductive medicine | Ask the clinic to confirm. | Ask the clinic to confirm. | Fertility team, laboratory details, PGT options, pricing |
| Gift Fertility Clinic | Bangkok | Personalized IVF-related care | Ask the clinic to confirm. | Ask the clinic to confirm. | Treating doctor, laboratory, genetic testing pathway, quotation inclusions |
| Intrarat Hospital | Bangkok | Obstetrics and maternity services (IVF profile incomplete) | Ask the clinic to confirm. | ISO 9001:2015 | IVF/ICSI availability, embryo culture, PGT, international patient support |
| Jetanin Hospital | Bangkok (Pathum Wan) | IVF/ICSI, IUI, IMSI, PESA/TESE, egg/embryo freezing, blastocyst culture, sperm testing, genetic carrier screening | In-house embryo, genetics, and sperm labs; EmbryoScope; NGS and Sanger sequencing for PGT | JCI, RTAC, ISO 15189, ISO 15190 | Current certificate scope, named doctor, case-specific lab pathway, written quotation |
| MedPark IVF Fertility and Genetics Center | Bangkok (Khlong Toei) | IVF/ICSI, IUI, egg/sperm/embryo freezing, PGT-A/M/SR, recurrent miscarriage evaluation, fertility preservation | Time-lapse incubation, AI-assisted embryo assessment | Ask the clinic to confirm. | Package validity, medication, PGT, freezing, storage, transfer, exclusions |
| PMG Hospital | Bangkok | Prenatal care, obstetrics (IVF profile incomplete) | Ask the clinic to confirm. | Ask the clinic to confirm. | IVF/ICSI availability, embryo culture, PGT, international patient support |
| Prime Fertility Clinic | Bangkok (Pearl Bangkok) | IVF, ICSI, embryo freezing, assisted hatching, international patient care | Ask the clinic to confirm. | JCI Ambulatory Care | Current services, inclusions, pricing in written quotation |
| Superior A.R.T. Thailand | Bangkok (Ratchathewi) | IVF, ICSI, PGT pathways | Assisted-reproduction laboratories | Ask the clinic to confirm. | Treating doctor, lab plan, PGT method, package boundary, age-specific outcomes |
Questions to Ask a Thai IVF Hospital About Success Rates
When you contact a clinic, ask these specific questions to get comparable data:
- What is your success rate definition? (e.g., live birth per embryo transfer, clinical pregnancy per cycle)
- Can you provide success rates broken down by my age group?
- What time period does your data cover?
- Is your data audited by an external body?
- How many cycles did you perform in that period?
- Do you report cumulative live birth rates after multiple cycles?
- What is your policy for transferring mosaic or low-grade embryos?
Beyond Success Rates: What Else to Compare
Success rates are one piece of the puzzle. Consider these factors when comparing hospitals:
Laboratory Quality and Technology
Ask about the embryology laboratory, including incubators, time-lapse imaging, and genetic testing capabilities. Some hospitals highlight specific equipment, but the experience of the embryology team is equally important.
Genetic Testing (PGT)
If you are considering PGT, check whether the hospital offers PGT-A, PGT-M, or PGT-SR, and whether the lab is in-house or outsourced. In-house labs may offer faster turnaround and more integrated care.
International Patient Support
For international patients, consider language support, coordination services, and how the hospital handles remote consultations and travel logistics.
Cost Transparency
Ask for a written quotation that itemizes all costs: medications, lab fees, PGT, freezing, storage, and transfer. Some hospitals offer packages, but confirm what is included and what is not.
Next Steps: Your Checklist for Comparing IVF Hospitals
- Shortlist 3-5 hospitals based on your priorities (location, services, budget).
- Request success rate data in writing, specifying your age group and the definition used.
- Ask for a detailed written quotation with all potential costs.
- Verify accreditations and laboratory standards directly with the hospital.
- Schedule a consultation to discuss your specific medical history and ask the questions above.
Remember, no success rate can predict your individual outcome. Use the data as a screening tool, not a guarantee.
Frequently asked questions
What is the most reliable IVF success rate measure?
Live birth rate per embryo transfer is more meaningful than clinical pregnancy rate, because it reflects the ultimate goal. However, cumulative live birth rate after multiple cycles gives a broader picture. Always ask which measure a clinic uses.
Why do IVF success rates vary so much between clinics?
Success rates vary due to differences in patient demographics (especially age), embryo transfer policies, laboratory standards, and how outcomes are defined. A clinic that treats younger patients or transfers multiple embryos may report higher rates.
Can I trust success rates published on hospital websites?
Published rates can be useful, but they are not standardized. Ask for the exact definition, time period, and whether the data is audited. Cross-check with your own questions and consider the clinic's overall reputation.
Does a higher success rate mean a better hospital?
Not necessarily. A high rate may reflect a favorable patient mix or a more aggressive transfer policy. Look for transparency, laboratory quality, and whether the clinic provides age-specific data that matches your profile.
How should I use success rates when choosing a clinic?
Use success rates as a screening tool, not a guarantee. Combine them with other factors like laboratory technology, genetic testing options, cost transparency, and your comfort with the medical team. Always confirm details directly with the 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.
