Whether high thyroid stimulating hormone in early pregnancy will affect fetal intellectual development should also be combined with other thyroid function test results. If hypothyroidism is present, it may affect fetal mental development and prompt medical attention is recommended. High thyroid stimulating hormone, if combined with a decrease in T3 and T4, is generally considered as clinical hypothyroidism, which may affect the neurointellectual development of the fetus to a certain extent, and may even cause preterm labor, miscarriage, etc. At this time, medication is generally required, such as the use of levothyroxine sodium tablets. Thyroid stimulating hormone is high, but there is no T3, T4 abnormalities, generally known as subclinical hypothyroidism, generally do not need special treatment, you need to carry out regular review of thyroid function. Thyroid stimulating hormone is high in early pregnancy, you should consult a doctor in time, regular review.