Should couples get thalassemia screening before marriage?
One simple test before marriage can protect a child.
One simple test before marriage can protect a child.
Yes, couples in India should consider thalassemia screening before marriage: beta-thalassemia is caused by HBB gene variants and roughly 1 in 25 Indians is a silent carrier, so if both partners are carriers there is a 1-in-4 chance each pregnancy of a seriously affected child.
Beta-thalassemia is an inherited blood disorder caused by variants in the HBB gene, which makes part of haemoglobin. Carriers, people with one affected copy, are usually completely healthy and have no symptoms, so most never know they carry it. The issue arises when two carriers have children. With each pregnancy there is a 1-in-4 chance the child inherits two affected copies and develops thalassemia major, a severe condition requiring lifelong blood transfusions and medical care.
This is highly relevant in India. Carrier rates are significant nationwide, averaging around 1 in 25, and higher in several communities, and India sees thousands of children born with thalassemia major every year. Because carriers are symptom-free, screening is the only way to know. A simple, inexpensive blood test (a complete blood count plus haemoglobin electrophoresis, HbA2) can identify carriers, and ICMR and many state programmes recommend premarital or pre-pregnancy screening, particularly in higher-prevalence communities.
The honest, practical takeaway: screening is not about discouraging anyone from marrying. It is about knowing your status so you can make informed choices. If both partners turn out to be carriers, a genetic counsellor can explain the options, which may include prenatal testing. If only one or neither is a carrier, you can proceed with reassurance. One affordable test, ideally before marriage or before planning a pregnancy, can prevent a lifetime of suffering for a child, which is why it is so widely encouraged in India.
A complete blood count plus haemoglobin electrophoresis (HbA2) is the standard, inexpensive screening test to identify beta-thalassemia carriers, even when they have no symptoms.
Each pregnancy carries a 1-in-4 chance of a child with thalassemia major. A genetic counsellor can explain options, including prenatal testing, so you can decide informed.
Yes, because carriers are usually completely healthy with no symptoms. Feeling well does not rule out being a carrier, so a blood test is the only way to know.
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