Thyroid hormone is high but not too high, it is caused by physiological reasons, it will not have any effect on the fetus, high thyroid hormone is more obvious, it may affect the normal growth of the fetus, affect the intellectual development of the fetus. After pregnancy, due to the increased physiological needs of the fetus, thyroid hormone may appear physiological elevation, thyroid hormone is only slightly high, will not cause too much effect on the fetus, you can temporarily observe. The high thyroid hormone should be considered as hyperthyroidism. In patients with hyperthyroidism, the basal metabolic rate will increase, which will easily cause tissue hypoxia, and hypoxia will affect the normal growth and development of the fetus. High thyroid hormone may be caused by hyperthyroidism, taking medication during pregnancy, suppressing fetal thyroid function after using medication will cause fetal congenital hypothyroidism, which then affects the development of the fetal nervous system, and there will be a manifestation of backwardness in the intellectual development of the fetus. High thyroid hormone may affect the fetus, it is recommended to consult a doctor to see if the pregnancy should continue.