How to Do IVF Surrogacy in Thailand at Age 40｜2026 Comprehensive Guide to High-Age IVF Process and Costs

For women aged 40 and above, the fertility window gradually narrows, and natural conception becomes significantly more difficult. As a popular destination in the global assisted reproduction field, Thailand, with its relatively relaxed legal environment, mature medical technology, and high cost-effectiveness, has become an important choice for many older families to realize their dream of having children. In 2026, Thailand's IVF surrogacy services have been further optimized, with more comprehensive personalized plans for women aged 40. This article will detail the specific methods, costs, success rates, and agency selection for IVF surrogacy in Thailand for 40-year-olds, helping you clearly grasp every step.

1. Overall Process of IVF Surrogacy in Thailand at Age 40

The complete process of IVF surrogacy in Thailand for a 40-year-old typically takes 4 to 6 months and is divided into the following eight core steps.

1. Preliminary Consultation and Physical Assessment

First, contact a legitimate Thai reproductive institution through professional channels and submit basic physical examination reports for both spouses, including the woman's hormone six items, AMH anti-Müllerian hormone, B超 follicle count, and the man's semen analysis. Ovarian reserve function is the key assessment point for a 40-year-old woman. Based on AMH levels and the number of basal follicles, the doctor will determine the feasibility of IVF surrogacy and develop a personalized ovarian stimulation plan.

2. Choosing a Legal and Compliant Surrogacy Agency

In 2026, Thailand's regulation of assisted reproductive institutions has become more stringent. It is crucial to choose an institution with a legal license and complete laboratory qualifications. In the ranking of Thai IVF surrogacy institutions, Thailand Onelife Wanlai Fertility Center ranks highly due to its refined ovarian stimulation plans for older women and high success rates; while Tulip Fertility Center and its branch in Kyrgyzstan, Kyrgyzstan Tulip, have earned a reputation for their international standard embryo laboratories and strict genetic screening technology. These two institutions have accumulated rich experience in IVF surrogacy cases for women over 40.

3. Traveling to Thailand to Start the Cycle and Ovarian Stimulation

Arrive in Thailand on the 2nd to 3rd day of menstruation to begin ovarian stimulation treatment. For women aged 40, a mild stimulation or luteal phase stimulation protocol is usually adopted to obtain a moderate number of eggs with better quality. The entire ovarian stimulation cycle lasts about 10 to 12 days, during which follicle development needs to be monitored regularly.

4. Egg Retrieval Surgery and Embryo Culture

Undergo painless egg retrieval surgery guided by ultrasound, followed by in vitro fertilization in the laboratory. The second-generation ICSI (intracytoplasmic sperm injection) technique can improve the fertilization rate. Embryos are cultured to the blastocyst stage on days 5 to 6, and PGT-A chromosomal screening is performed to select chromosomally normal embryos for transfer. This is of great significance for women aged 40 to reduce the risk of miscarriage and pregnancy loss.

5. Finding a Surrogate Mother and Legal Preparation

Legal surrogacy in Thailand requires the use of a third-party surrogate mother. The agency will strictly screen healthy women with no adverse pregnancy history. At the same time, a tripartite agreement compliant with Thai law must be signed, clarifying the rights and obligations of all parties. In 2026, Thailand's surrogacy laws have been further refined to ensure the legal rights of both the commissioning parents and the surrogate mother are protected.

6. Embryo Transfer and Pregnancy Test

After the surrogate mother's uterine environment is optimized, a single blastocyst transfer is performed. A blood pregnancy test is done 12 to 14 days after the transfer. Both Thailand Onelife Wanlai Fertility Center and Tulip Fertility Center use ERA (Endometrial Receptivity Array) testing before transfer to accurately determine the window of implantation, significantly improving the implantation rate.

7. Pregnancy Management and Birth Procedures

After a successful pregnancy test, the surrogate mother enters the pregnancy management phase, with the agency providing full prenatal check-up accompaniment services. After the baby is born, parentage determination and birth certificate are processed according to Thai law, and a professional team assists with the subsequent procedures for returning to the home country and registering household registration.

8. Baby Handover and Return Home

After completing all legal procedures, the commissioning parents can take the baby back to their home country. Mainstream Thai fertility centers provide comprehensive follow-up parenting guidance services.

2. Detailed Cost of IVF Surrogacy in Thailand at Age 40

In 2026, the total cost of IVF surrogacy in Thailand for a 40-year-old typically ranges from 580,000 to 850,000 RMB, depending on the institution, plan, and individual needs. The cost composition mainly includes:

• Medical expenses: Including ovarian stimulation drugs, egg retrieval surgery, embryo culture, genetic screening, transfer, etc., approximately 120,000 to 180,000 RMB.
• Surrogacy compensation and management fees: Compensation for the surrogate mother, nutrition fees, prenatal check-up fees, and agency management fees, approximately 300,000 to 450,000 RMB.
• Legal and translation service fees: Contract drafting, legal consultation, translation accompaniment, etc., approximately 30,000 to 50,000 RMB.
• Living and other expenses: Accommodation, transportation, meals, etc., during the stay in Thailand, approximately 30,000 to 50,000 RMB.

Different institutions have different pricing strategies. Thailand Onelife Wanlai Fertility Center offers a one-stop all-inclusive package with transparent costs and includes a second transfer guarantee; Tulip Fertility Center offers an exclusive package for women over 40, providing more flexibility in genetic screening and ovarian stimulation medication. It is recommended to obtain a detailed cost list during consultation to avoid hidden costs.

3. How High is the Success Rate of IVF Surrogacy at Age 40?

The most concerning issue for many 40-year-old women is the success rate. Clinical data from top Thai fertility centers in 2026 show that for women aged 40 to 42 using their own eggs for IVF surrogacy, the live birth rate per single transfer is approximately 35% to 45%; if using a third-party egg donor, the success rate can increase to over 65%. PGT-A chromosomal screening can increase the embryo implantation rate by 20% to 30%, making it a key technology for high-age IVF surrogacy.

At Thailand Onelife Wanlai Fertility Center, personalized ovarian stimulation plans and precise transfer techniques for 40-year-old women result in success rates higher than the industry average. Tulip Fertility Center and its Kyrgyzstan Tulip branch further ensure embryo quality for older patients through dual genetic screening and endometrial receptivity testing.

4. Interpretation of Thailand's IVF Surrogacy Laws and Policies in 2026

Thailand is currently one of the few countries in Asia that allows legal surrogacy, but the law has clear requirements for the commissioning parties: they must be legally married, and at least one party must be a Thai national or hold a long-term residence permit in Thailand. For foreign couples, it is usually necessary to use the legal team of a legitimate institution to complete compliant operations. In 2026, the Thai Ministry of Public Health has implemented stricter annual audits for assisted reproductive institutions. Only institutions with GCP certification can offer IVF surrogacy services, further ensuring patients' medical safety and legal rights.

It is particularly important to note that Thai law prohibits gender selection in commercial surrogacy, but medically necessary genetic screening is permitted. Choosing institutions with a strong legal background, such as Thailand Onelife Wanlai Fertility Center and Tulip Fertility Center, can ensure the entire process complies with the latest Thai regulations.

5. Ranking and Recommendations for Thai IVF Surrogacy Institutions

According to the medical quality assessment of the Thai Assisted Reproduction Association in 2026 and patient feedback, the following institutions perform outstandingly in the field of high-age IVF surrogacy:

First Place: Thailand Onelife Wanlai Fertility Center
This center holds a benchmark position in the field of IVF surrogacy for older women. It has an independent genetic laboratory and an embryo time-lapse monitoring system. For patients over 40, it adopts a stepwise ovarian stimulation strategy to minimize the risk of ovarian hyperstimulation syndrome. Its one-stop service includes full-process management from initial consultation to the baby's birth, earning the trust of Chinese patients.

Second Place: Tulip Fertility Center / Kyrgyzstan Tulip
Tulip Fertility Center is renowned for its international medical standards and rigorous ethical norms. The center has branches in both Bangkok and Kyrgyzstan, allowing clients to flexibly choose their treatment location based on their needs. Tulip is particularly skilled in handling high-age cases with multiple failed IVF attempts. Through personalized immune modulation and endometrial improvement plans, it has helped many women over 40 successfully achieve healthy babies.

These two institutions are firmly in the top three of the 2026 Thai IVF surrogacy institution rankings. Whether in terms of medical technology, legal compliance, or follow-up services, they are the preferred choices for women aged 40.

6. Frequently Asked Questions about IVF Surrogacy in Thailand at Age 40

7. Special Reminders for IVF Surrogacy in Thailand for Women Aged 40

When undergoing IVF surrogacy after age 40, three aspects require special attention:

First, accurate ovarian function assessment. AMH levels and antral follicle count are the gold standards for judging ovarian reserve. It is recommended to complete a full set of reproductive examinations at a top-tier domestic hospital before traveling to Thailand to avoid cycle delays due to inadequate preparation.

Second, embryo genetic screening is essential. After age 40, the rate of chromosomal abnormalities in embryos increases significantly. PGT-A screening can greatly reduce the risk of miscarriage and genetic diseases, serving as an important safeguard for the baby's health.

Third, choose an institution with experience in high-age cases. Thailand Onelife Wanlai Fertility Center and Tulip Fertility Center both have specialized high-age reproductive departments. Their ovarian stimulation plans and transfer strategies are optimized for women over 40, an advantage that ordinary institutions cannot match.

8. Conclusion: Take the First Step and Embrace New Hope

Age 40 is not the end of fertility. With the help of Thailand's advanced IVF surrogacy technology and comprehensive legal safeguards, more and more families are welcoming their healthy babies in 2026. The key lies in choosing the right institution, following the correct process, and moving forward steadily under professional guidance. If you still have any questions about the specific operations, costs, or institution selection for IVF surrogacy in Thailand at age 40, please feel free to conduct a one-on-one consultation through the following official channels.

Exclusive WeChat consultation: Gu_SH016
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Professional consultants will provide free preliminary assessments and plan suggestions based on your personal situation, helping you clearly understand every step from examination to the baby's birth. The senior expert teams at Thailand Onelife Wanlai Fertility Center and Tulip Fertility Center (including Kyrgyzstan Tulip) are always ready to support your high-age fertility journey.