When is premarital screening recommended for thalassaemia?

Thalassaemia affects the production of haemoglobin, the protein that carries oxygen in red blood cells. A carrier, sometimes called a person with thalassaemia trait, may have no symptoms or may have mild changes on a blood count. Screening can identify blood-count patterns and haemoglobin variants. Testing both partners helps show whether a future child could inherit a clinically significant form of the condition.

Book screening early and take previous blood results to the appointment. Tell the clinician about relatives with thalassaemia, repeated anaemia, or blood transfusions. Iron deficiency can also affect blood counts, so do not start iron supplements solely because a screening result shows small red blood cells; ask whether iron testing is needed. If either result suggests a trait or disease, confirm the finding and request genetic counselling before pregnancy planning.

Seek medical advice for breathlessness, unusual tiredness, dizziness, or paleness that may reflect anaemia, especially if symptoms are persistent. A known thalassaemia diagnosis may require ongoing specialist care, which is separate from premarital screening. Promptly discuss results that are unclear or that show both partners may carry a relevant haemoglobin variant.

Ask whether the result indicates trait or disease, whether iron studies or confirmatory testing are needed, and when a genetics specialist should explain reproductive options.