What could be a possible complication of untreated hyperthyroidism during pregnancy?

Untreated hyperthyroidism during pregnancy can lead to a condition known as thyroid storm, which is a life-threatening exacerbation of hyperthyroidism. This can be characterized by a rapid increase in heart rate, elevated body temperature, and severe metabolic imbalances.

In the context of pregnancy, thyroid storm can pose significant risks not only to the mother but also to the developing fetus. The physiological changes during pregnancy, such as increased blood volume and adjustments in metabolism, can exacerbate the symptoms of hyperthyroidism and potentially trigger a thyroid storm if the condition is not appropriately managed.

While fetal goiter can occur as a direct consequence of maternal hyperthyroidism, particularly if there is excess thyroid hormone transfer to the fetus, it is not considered as immediate and severe a complication as thyroid storm. Diabetes Mellitus and ectopic pregnancy do not have a direct causal relationship with hyperthyroidism; thus, they are not relevant complications in this context.