Questions to Ask About an In-House vs. External PGT Laboratory

When you are planning IVF with preimplantation genetic testing (PGT), one of the practical decisions you will face is whether the clinic uses its own in-house laboratory or sends samples to an external facility. Both models can work well, but they differ in how samples are handled, how results are reported, and how you can verify quality. This guide gives you a clear set of questions to ask so you can make an informed choice that fits your needs.

At a Glance: Key Points to Consider

• Ask how samples are transported and tracked between the clinic and the lab.
• Check what accreditations or certifications the lab holds.
• Understand who interprets the results and how they are explained to you.
• Clarify how long results take and what happens if a sample needs to be repeated.
• Ask about data privacy and how your genetic information is stored.

Understanding the Two Models

An in-house PGT laboratory is located within the IVF clinic or is operated by the same organization. This can mean shorter transport times and closer communication between the embryology team and the genetic lab. An external laboratory is a separate facility that receives biopsy samples from the clinic. This may be a specialized genetic testing company that handles samples from many clinics.

Neither model is inherently better. The right choice depends on the clinic’s protocols, the lab’s quality standards, and your own preferences for communication and turnaround time.

Key Questions About Sample Handling and Transport

Sample handling is critical because embryos are delicate, and the biopsy sample must reach the lab in good condition. Ask the clinic:

• How are biopsy samples packaged and transported to the lab?
• What is the typical transport time, and how is temperature stability maintained?
• Is there a chain-of-custody process to ensure samples are not mixed up?
• What happens if a sample is damaged or lost in transit?

For external labs, ask whether the clinic has a dedicated courier service or uses a standard shipping method. For in-house labs, ask how the lab is physically connected to the clinic and what backup systems exist in case of equipment failure.

Questions About Laboratory Quality and Accreditation

Quality standards are essential for reliable PGT results. You can ask about the lab’s accreditations, but remember that accreditation bodies vary by country. Some internationally recognized standards include ISO 15189 for medical laboratories and CAP (College of American Pathologists) accreditation. However, not all labs have these, and some may follow national guidelines.

Useful questions include:

• What accreditations or certifications does the laboratory hold?
• How often is the lab inspected, and by whom?
• What quality control measures are in place for each batch of tests?
• Can you provide details on the lab’s participation in external proficiency testing?

If the clinic is hesitant to share this information, that may be a red flag. A reputable lab should be transparent about its quality practices.

Questions About Reporting and Communication

Understanding your PGT results is crucial. Ask how the results are reported and who will explain them to you.

• Who interprets the PGT results – the lab or the clinic’s genetic counselor?
• Will you receive a written report, and how detailed is it?
• How long does it take to get results after the biopsy?
• What happens if the results are inconclusive or ambiguous?
• Is there a genetic counselor available to discuss the results with you?

For external labs, ask whether the clinic has a direct line of communication with the lab’s scientists. For in-house labs, ask how the embryology and genetics teams coordinate.

Questions About Data Privacy and Security

PGT involves sensitive genetic information. You should know how your data is protected.

• How is your genetic data stored and who has access to it?
• Is the data anonymized or de-identified for research purposes?
• What are the lab’s data retention policies?
• Do you have the right to request deletion of your data?

These questions are important regardless of whether the lab is in-house or external, but they may be especially relevant when samples are sent to a third party.

Comparing In-House and External Labs: A Checklist

Use this table to compare the two models based on your priorities. Fill in the details you receive from the clinic.

Criteria	In-House Lab	External Lab
Sample transport time	Usually shorter	May be longer
Communication with lab	Potentially easier	May require coordination
Accreditation	Ask for details	Ask for details
Turnaround time	Ask for typical time	Ask for typical time
Data privacy	Ask about policies	Ask about policies

This table is a starting point. Always confirm the specifics with your clinic.

How to Verify IVF Hospitals and Laboratories in Thailand

If you are considering treatment in Thailand, you can apply the same questions to any clinic you evaluate. Here are some general steps to verify the quality of an IVF hospital and its associated laboratories:

1. Check the clinic’s official website for information about its laboratory and any accreditations.
2. Ask the clinic directly for details about its lab’s quality certifications and inspection history.
3. Look for independent reviews or patient experiences, but remember that these are subjective.
4. Contact the clinic’s patient coordinator to ask specific questions about sample handling and reporting.
5. Consider whether the clinic is transparent about its processes – a willingness to answer questions is a good sign.

Remember that regulations and accreditation bodies vary by country. Always verify current requirements with the relevant authorities.

Next Steps: Your Checklist

Before you decide, make sure you have clear answers to these questions:

• What is the exact process for sample handling and transport?
• What quality accreditations does the lab hold?
• Who will explain my results to me, and how long will I wait?
• How is my genetic data protected?
• What is the cost difference, if any, between in-house and external testing?

Cost is an important factor, but it should not be the only one. Reliable results and clear communication are worth the investment.

If you have more questions, our team can help you navigate your options. Explore our hospital directory to see which clinics you might contact, or visit our patient resources for more guides. For personalized assistance, feel free to contact us. You may also find answers in our FAQ section.

Frequently asked questions

What is the difference between an in-house and external PGT laboratory?

An in-house PGT laboratory is part of the IVF clinic or operated by the same organization, while an external laboratory is a separate facility that receives biopsy samples. Both can provide reliable testing, but they differ in sample transport, communication, and reporting processes.

How can I verify the quality of a PGT laboratory?

Ask about the lab's accreditations, such as ISO 15189 or CAP, and its participation in proficiency testing. You can also ask about quality control measures and inspection history. A reputable lab should be transparent about these details.

What should I ask about sample handling for PGT?

Ask how samples are packaged and transported, what the transport time is, and how temperature stability is maintained. Also ask about chain-of-custody procedures and what happens if a sample is damaged or lost.

How long does it take to get PGT results?

Turnaround times vary depending on the lab and the type of test. Ask your clinic for an estimated time frame. In-house labs may offer faster results due to shorter transport times, but this is not guaranteed.

Is my genetic data safe with an external lab?

Reputable labs follow strict data privacy regulations. Ask about data storage, access, retention policies, and whether you can request deletion. Ensure the lab complies with applicable laws in the country where it operates.

Continue your research

• Thailand hospital directory
• Patient resources
• Prepare a private case review

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.