I am in my second trimester of baby and had my Anomaly scan and was diagnosed that the right atria of the fetus is 1 mm bigger than the left atria.We don't have any family history of heart diseases.Will this be something serious?
A 1 mm difference between atrial sizes is quite insignificant. If the remainder of the heart valves are normal and not leaking, and the pumping chambers (ventricles) are normal in size and function, this may just be a normal variant. Your doctors may wish to rescan in the third trimester to follow up.
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