Genetic incompatibility in couples occurs when there is a negative interaction between the genes of both partners. Possible causes include the transmission of recessive genetic mutations, that is, the presence of certain hereditary diseases that do not manifest themselves in the parents but do manifest themselves in the children.
In simple terms, even if the parents do not show symptoms of certain genetic diseases, if they both carry a copy of the same defective gene, the baby could inherit both copies and develop the disease. In other words, if only one copy is present, the disease does not develop. The problem is when it occurs in two copies of the same defective gene.
This type of incompatibility is not always detected immediately, and often goes undetected until a couple tries to conceive and the baby has genetic problems. It is estimated that around 2 in 10 couples worldwide have fertility problems. Moreover, the World Health Organisation warns that 1 in 6 people are infertile.
Although exact statistics may vary, it is estimated that about 1-2% of couples may encounter problems with genetic incompatibilities in fertility treatments. However, it is important to note that preventive genetic testing is becoming increasingly accessible, allowing problems to be detected before treatment begins.
As these are genetic problems, it is not possible to avoid it as such, but early detection is key to prevent problems in the future baby. For this reason, genetic counselling is recommended before starting fertility treatment, especially if there is a family history of inherited diseases or if the parents are carriers of mutated genes. This can help to identify possible risks and make early decisions.

In this context, reproductive medicine is an increasingly common option for achieving pregnancy. In vitro fertilisation (IVF) treatments are especially effective in these cases, as there are multiple tools that increase the success rate (healthy baby at home).
Among them, the genetic compatibility test, which studies a series of recessive hereditary diseases present in both the future parents and the gamete donors, thus preventing the combination of both gametes from giving rise to a recessive disease that manifests itself in the future baby.
At IVF-Life we have a genetic compatibility test that allows us to detect genetic alterations in couples undergoing fertility treatments. This allows us to identify more than 500 genes that give rise to diseases and establish genetic compatibility between the woman who provides the eggs and the man who provides the sperm.
The test covers more than 250 inherited genetic diseases, including diseases such as cystic fibrosis, sickle cell anaemia, and other rare conditions. Through this test, it is possible to know whether both partners carry the same genetic mutations, which would allow them to assess the risk of their future children inheriting these diseases.
The process is simple and quick. Each partner provides a blood sample, which is sent to a specialised laboratory. The test results are delivered within a short period of time, and specialists can offer recommendations based on the results.
If both parents carry the same recessive genetic mutation, preimplantation genetic diagnosis (PGD) may be considered to select healthy embryos to increase the likelihood of pregnancy and thus the success of treatment.
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