Hypothyroidism will not result in having a baby that is very smart, instead it may affect the intelligence of the baby. Hypothyroidism refers to hypothyroidism. If a pregnant woman has hypothyroidism, it can have a significant impact on the fetus and the pregnant woman herself. Thyroid hormone is very important for brain development, low thyroid function can not meet the needs of fetal brain growth and development, which will affect the intellectual development of the fetus, the baby may be born with slow reaction, dull expression, and may even cause serious intellectual defects. Pregnant women suffering from hypothyroidism will involve many organs of the body, with chills, fatigue, low skin temperature, hearing impairment, hoarseness, swelling sensation of hands and feet, joint pain, slow heartbeat, constipation, etc. In serious cases, it may also cause mental abnormality, rigor mortis, coma, bradycardia, which will threaten the life of the pregnant woman and the fetus. Pregnant women with hypothyroidism should have their thyroid hormone levels monitored regularly and be treated in strict compliance with medical advice.