The answer is Fetal hypothyroidism. Antithyroid medications are contraindicated in late pregnancy because the fetus may develop fetal hypothyroidism, fetal bradycardia, goiter, and cretinism.
An endocrine system illness called hypothyroidism, also known as low thyroid, underactive thyroid, or hypothyreosis, is characterized by insufficient thyroid hormone synthesis by the thyroid gland. It can result in a variety of symptoms, such as a decreased tolerance to cold, fatigue, constipation, a slow heartbeat, depression, and weight gain. Goiter can occasionally cause the front of the neck to expand. Untreated pregnancy-related hypothyroidism may result in congenital iodine deficiency syndrome or a delay in the growth and intellectual development of the unborn child.
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