Can IVF with Genetic Testing Help Prevent Recurrent Pregnancy Loss?

The loss of a pregnancy on a repeated basis can be extremely demoralising for couples who want to have a baby. Nevertheless, advances in reproductive technology make the situation much more hopeful. Through the use of In-vitro Fertilization with preimplantation genetic testing for recurrent miscarriage, one can screen out chromosomally abnormal embryos before their transfer. This article explores how this powerful combination works and whether it may be right for you. Why Recurrent Pregnancy Loss Happens Recurrent pregnancy loss means two or more pregnancy losses. Some specialists in India still use the older definition of three or more, but most international bodies now recommend investigation after two. The causes vary. They include: Chromosomal problems in the embryo are the most common cause behind roughly 50-60% of early miscarriages Uterine structural problems like a septum, fibroids inside the cavity, polyps, or scar tissue that block healthy implantation Hormonal and immune factors like thyroid disorders, antiphospholipid syndrome (a blood-clotting condition), or elevated natural killer cell activity Parental chromosomal issues where one or both parents carry a chromosomal rearrangement that produces abnormal embryos, even though the parent looks healthy Unexplained causes are frustrating, as they still account for a portion of cases even after full testing Of all these, chromosomal problems in the embryo are the single most common cause. This is exactly where genetic testing and recurrent miscarriage come together most clearly. What is Preimplantation Genetic Testing? Preimplantation genetic testing (PGT), also called PGT, is a process where embryos made through IVF are tested for genetic or chromosomal problems before they are placed in the uterus. Only a few cells are taken from each embryo on day five of development, when the blastocyst stage is reached. These cells go to a genetics lab while the embryo is frozen and waits for results. The test shows which embryos have the right number of chromosomes, called euploid embryos and which do not. Only chromosomally normal embryos are picked for transfer. This cuts the chance of transferring an embryo that would miscarry because of a chromosomal problem. There are various types of PGT: PGT-A (aneuploidy): Determines whether there are any chromosomal defects and that there are the right number of chromosomes. The most common type used for recurring miscarriages. PGT-M (monogenic disorder): Screened for a particular disease, such as thalassaemia or sickle cell anaemia, if the parents are both known to be carriers. PGT-SR (structural rearrangement): Used where a parent is carrying a chromosomal abnormality, such as a translocation, that could create an abnormal embryo even in a healthy individual. How Does PGT Help After Recurrent Pregnancy Loss? The logic is simple. If most miscarriages are caused by chromosomally abnormal embryos, and PGT can find which embryos are chromosomally normal before transfer, then transferring only normal embryos should reduce miscarriage rates. Studies back this up. Transferring a euploid embryo confirmed chromosomally normal by PGT-A leads to lower miscarriage rates per transfer compared to transferring untested embryos. For couples who have had repeated losses, this can mean fewer painful cycles and a better chance of carrying a pregnancy through. PGT for recurrent miscarriage does not guarantee a successful pregnancy. A chromosomally normal embryo can still fail to implant or be lost for other reasons, like immune factors, uterine problems, or causes not yet fully understood. But removing chromosomal abnormality from the picture is a real and meaningful step for couples where that is likely to be part of the problem. IVF after recurrent pregnancy loss with PGT also gives couples real information. If several embryos are tested and many come back abnormal, that itself matters; it may lead to further testing of the parents' chromosomes, a look at egg quality, or a conversation about donor eggs or sperm. Who Should Consider IVF with Genetic Testing? Not every couple who has had a miscarriage needs IVF with PGT. The decision depends on what has been found through testing and what the likely cause is. IVF after recurrent pregnancy loss with preimplantation genetic testing is most worth considering for: Couples with unexplained recurrent miscarriage after full testing. When structural, immune, and hormonal causes have been ruled out, chromosomal problems in the embryo become the most likely explanation. PGT-A helps address this directly. Women over 35 with recurrent loss. In older women, chromosomal abnormalities within the egg cells increase. Therefore, PGT-A becomes important since there is a higher chance of aneuploidy. Couples where one of them has a chromosomal translocation or rearrangement. This is found through a blood test called a karyotype. When a translocation is present, embryos have a higher chance of being unbalanced, leading to miscarriage or a chromosomal condition in the child. PGT-SR picks out which embryos are balanced and safe to transfer. Couples with repeated IVF failure. If healthy-looking embryos have been transferred multiple times without success, chromosomal abnormality may be the reason no one has investigated yet. Couples who have had a previous pregnancy affected by a chromosomal condition. PGT-A in future cycles reduces the chance of this happening again. What PGT Does Not Fix Genetic testing and recurrent miscarriage management need to be understood honestly. PGT screens for chromosomal problems. It does not fix: Uterine structural problems need their own surgical assessment and treatment Immune-related causes like antiphospholipid syndrome or elevated natural killer cells need separate medical management Hormonal causes, like thyroid disorders, need to be found and treated on their own All possible genetic conditions, PGT-A checks chromosome numbers but does not test for every single-gene condition unless specifically asked for through PGT-M This is why PGT works best as part of a full recurrent miscarriage assessment, not as a standalone fix. Before going ahead with IVF and PGT, couples should ideally have had a uterine assessment, parental chromosome testing, a blood clotting screen, thyroid testing, and immune investigations where needed. Practical Realities in India PGT is available at most established fertility centres in metro cities and increasingly in larger tier-2 cities across India. Adding PGT to an IVF cycle costs significantly more than a standard cycle; the biopsy and genetic analysis add a meaningful amount on top of the usual IVF fees. One real concern is embryo numbers. PGT needs enough embryos to test. If only one or two embryos are made in a cycle, and testing shows they are all abnormal, there are no embryos left to transfer. This does happen, and couples should be prepared for it. Talk to your fertility specialist about expected embryo numbers based on your age and ovarian reserve before committing to a PGT cycle. Conclusion Recurrent pregnancy loss deserves real answers, not just reassurance. For couples where chromosomal problems are likely playing a role, IVF with PGT offers a clear way to reduce the risk of another loss by choosing only genetically normal embryos for transfer. It is not a guarantee, and it works best when paired with a full investigation. But for the right couples, it genuinely changes what is possible.

Preimplantation genetic testing IVF is a process where embryos made through IVF are tested for chromosomal or genetic problems before being placed in the uterus. A few cells are removed from each embryo at around day five and sent to a genetics lab. Only chromosomally normal embryos are chosen for transfer. PGT-A checks chromosome numbers, PGT-M tests for specific inherited conditions, and PGT-SR is used for chromosomal rearrangements.

Genetic testing and recurrent miscarriage management work by removing chromosomally abnormal embryos from the transfer pool. Since most early miscarriages are caused by chromosomal errors, transferring only tested normal embryos lowers miscarriage rates per transfer. Other factors, like uterine health and immune causes, can still affect outcomes, but taking chromosomal problems out of the picture removes one of the most common reasons for early pregnancy loss.

IVF after recurrent pregnancy loss with PGT is most useful for couples with unexplained recurrent miscarriage after full testing, women over 35, where chromosomal errors are more common, couples where one partner carries a chromosomal rearrangement, and those with repeated failed IVF cycles. It is not the right step for every couple who has lost a pregnancy; a complete investigation first helps show whether chromosomal factors are likely to be the main cause.