Haemoglobin D trait (heterozygous form) is an abnormal haemoglobin variant which when present is clinically asymptomatic but its coinheritance with other haemoglobinopathies like haemoglobin S (Hb S) or thalassemia can cause sickle cell disease and chronic haemolytic anaemia of moderate severity. Also patients with haemoglobin D (Hb D) trait can pass the trait to their children. Hb D disease (homozygous form) is a rare disease and usually presents with mild haemolytic anaemia and mild to moderate splenomegaly. Case of a pregnant patient diagnosed incidentally with Hb D trait in her antenatal period posted for elective lower segment caesarean section has been reported.