Final answer:
Reduced thyroid hormone levels in children, often due to hypothyroidism, are associated with delayed tooth eruption, as well as other growth and developmental issues.
Step-by-step explanation:
The reduced thyroid hormone level in a child is associated with delayed tooth eruption. Lower levels of thyroid hormones, due to hypothyroidism, can lead to a variety of developmental issues in children, including growth defects. Conditions like cretinism, which is characterized by dwarfism, thick tongue and skin, and sexual undevelopment, are results of severe iodine deficiency and hypothyroidism during development. Hypothyroidism in a child can slow down the rate at which teeth develop and erupt, thereby leading to a delay in the natural tooth eruption process.