Carrier Screening Genetic Testing Before Parenthood

Typically, general health checkups may only include screening for specific diseases, such as genetic conditions like thalassemia, which is common in Thailand. However, these checkups have limitations and can only detect a limited number of diseases at a time. On the other hand, cutting-edge technology like Next-Generation Sequencing (NGS) can test for hundreds of genes simultaneously, offering a broader and more comprehensive analysis.

This advancement in technology makes carrier screening more effective, providing clearer, more accurate, and comprehensive results. It is an essential tool that helps reduce the health risks that may affect your child in the future.

While pregnancy is a joyous time, the unseen genetic risks can become a source of worry later on. However, undergoing carrier screening is a crucial preventative step that can reassure couples in several ways:

• Reduces the Risk of Passing Severe Diseases to Your Child : Even if parents don’t show symptoms of a disease, if both carry the same type of abnormal gene for a specific condition, their offspring have a high chance of inheriting that disease, following genetic principles. For instance, in the case of Thalassemia, if both parents are carriers, the child might develop severe anemia requiring lifelong treatment. Carrier screening, therefore, helps to screen and assess the initial risk, preventing severe diseases even before conception.
• Enables Appropriate Family Planning : If genetic testing reveals a risk of passing a disease to the child, the couple can plan a safer and more confident pregnancy with medical assistance. This can involve using methods like ICSI combined with Preimplantation Genetic Testing (PGT-A and PGT-M to screen embryos and reduce the chances of transmitting abnormalities to the baby. This minimizes the burden of future care and increases the likelihood of a safe pregnancy. Couples may also opt for other preventative measures recommended by a physician, such as prenatal diagnosis or preparing a treatment plan early on.
• Prepares for the Possibility of a Sick Child : If a genetic abnormality does occur in the child in the future, having undergone carrier screening beforehand provides the family with information and preparedness to cope immediately. This includes planning for treatment, learning about condition-specific care, emotional preparation, and managing the costs of treatment. Having this information can reduce anxiety and boost confidence in caring for a child who may have a genetic condition.

• Thalassemia: Highly prevalent in Thailand and Southeast Asia. Children born with the severe form of the disease require lifelong regular blood transfusions.
• Spinal Muscular Atrophy (SMA): Caused by an abnormality in the SMN1 gene, which affects the function of motor nerve cells. Children with this disease often lose movement and may have a short lifespan.
• Hereditary Hearing Loss: Children with abnormalities in this group of genes often have hearing problems from an early age. If not detected and treated promptly, it can impact language development and learning.