In the world of assisted reproduction, pre-implantation genetic testing (PGT) is emerging as a key tool. If you are considering IVF with PGT, it’s crucial to understand what it is, how it works, and why it matters in 2025.
What is PGT?
PGT (sometimes also called pre-implantation genetic diagnosis or PGD) is a procedure done alongside in vitro fertilisation (IVF). Through PGT, embryos created via IVF are screened for genetic or chromosomal issues before they are transferred into the uterus.
In simple words: it gives prospective parents a chance to select embryos with the highest likelihood of healthy development, reducing the risk of inherited diseases or chromosomal abnormalities.
How the PGT process works
Here’s a step-by-step look at the procedure in a real-world setting:
- The couple undergoes an IVF cycle (egg retrieval, fertilisation, embryo development).
- At a certain stage (commonly the blastocyst stage, day 5–6) a small biopsy is taken from the embryo (typically trophectoderm cells).
- The biopsied cells are sent for genetic screening – depending on the type of PGT required.
- Based on results, one or more embryos judged as genetically favourable are selected for implantation.
- Pregnancy then proceeds as in a standard IVF transfer.
The goal is to transfer the “best” embryo(s) in terms of genetic health, thereby improving chances of implantation, reducing miscarriage risk, and avoiding certain inherited conditions.
Types of PGT
There are three commonly used types of PGT, each addressing different genetic concerns:
- PGT-A (for Aneuploidy):
This pre-implantation genetic testing checks if embryos have the right number of chromosomes. It helps identify those with extra or missing ones, improving IVF success rate with PGT. - PGT-M (for Monogenic disorders):
Used when parents carry a single-gene condition like cystic fibrosis or sickle cell, PGT-M helps choose embryos free from that disorder during IVF with PGT. - PGT-SR (for Structural Rearrangements):
This genetic screening for embryos finds chromosome changes such as translocations or inversions that can cause miscarriage, helping select healthy embryos for transfer.
Each type has its own indications and uses. For example, PGT-M is really for known gene disorders; PGT-A is more broadly used in IVF to pick healthier embryos; PGT-SR is more specialised.
Why PGT matters in 2025
There are several reasons why PGT has become more relevant and beneficial now:
- Improved IVF success rates: Using PGT-A for embryo selection has been shown to increase live birth rates in certain groups (for example older women) compared to IVF without PGT.
- Preventing inherited diseases: With PGT-M, couples who carry known genetic mutations can reduce the risk of passing them on to their children.
- Classifying embryo quality better: Embryos with correct chromosome count tend to have better implantation potential and lower miscarriage risk.
- Advanced technologies: The genetic screening techniques (such as next-generation sequencing, improved biopsy methods) have improved accuracy, reduced risks, and lowered cost/time burden compared to earlier eras.
Overall PGT is helping couples make more informed decisions and giving fertility specialists more data to work with.
Benefits of genetic testing before IVF
When you choose IVF with PGT or genetic screening for embryos, some of the clear benefits are:
- Better embryo selection means higher chance of successful transfer and live birth.
- Reduced risk of miscarriage or transfer failure due to chromosomal abnormalities.
- Avoidance of passing on a known hereditary disorder via PGT-M.
- Longer-term peace of mind for parents in terms of the genetic health of their future child.
- Potentially fewer IVF cycles needed if a genetically healthy embryo is chosen early.
Latest advancements in PGT technology (2025 outlook)
In 2025 the field of PGT is evolving fast. Here are some of the latest innovations in genetic screening for embryos and IVF with PGT:
- Non-invasive PGT: Researchers are developing methods where embryo culture fluid or blastocoel fluid is used instead of biopsy to assess genetic status, reducing risk to embryo development.
- Next-generation sequencing (NGS) and high-throughput screening: These enable more detailed analysis of embryo DNA, thus more precise selection of healthy embryos.
- AI and embryo analytics: Artificial intelligence coupled with time-lapse imaging and genetic data is helping embryologists pick embryos with higher implantation potential.
- Personalized embryo screening: Embryo tests increasingly integrate multiple data streams (genetic, morphokinetic, patient background) for optimized embryo selection.
In short, the process of PGT and embryo selection is becoming smarter, faster, more accurate and less invasive – making genetic screening for embryos a more viable part of IVF.
Role of PGT in personalized fertility treatment
One of the most exciting roles of PGT in 2025 is how it supports personalised fertility plans:
- With PGT testing in IVF, fertility specialists can tailor treatment protocols based on embryo genetic profile, patient age, ovarian reserve, and other health/lifestyle factors.
- Instead of a one-size-fits-all IVF protocol, personalized fertility treatment means choosing the embryo(s) that have the greatest chance of success and adjusting ovarian stimulation accordingly.
- For couples using IVF with PGT, the data from the embryo genetic screening informs not just which embryo to transfer, but when and how – sometimes leading to fewer cycles, lower emotional stress, and faster path to parenthood.
In short, PGT is playing a crucial role in making IVF treatments more individualised, efficient and aligned with each couple’s unique fertility journey.
Conclusion
In 2025, pre-implantation genetic testing (PGT) is more than a “luxury add-on” in IVF. It is a powerful tool that helps couples and fertility specialists make smarter choices about embryos, aiming for healthier pregnancies and children. While it does not remove all risk, and while it involves extra cost and careful counselling, its benefits especially in specific scenarios are compelling.
If you are facing IVF, ask your doctor about genetic screening for embryos, a clear explanation of PGT-A/PGT-M/PGT-SR, how it fits your situation, what the cost will be in your city and clinic in India 2025 and what outcomes you could expect.
