High thyroid stimulating hormone levels in early pregnancy need to consider the possibility of clinical or subclinical hypothyroidism in pregnancy, and can be treated with oral levothyroxine under the guidance of a medical professional after a definitive diagnosis has been made. If the thyroid stimulating hormone is greater than the upper limit of the reference range in pregnancy, there is a possibility of clinical or subclinical hypothyroidism, and it is necessary to improve the free thyroxine (FT4) test under the supervision of a physician. If the thyrotropin level is high in the presence of FT4 < the lower limit of the reference range in pregnancy, clinical hypothyroidism is considered; if the FT4 level is within the pregnancy-specific reference range, subclinical hypothyroidism is considered a possibility. If high thyroid stimulating hormone is detected during pregnancy, it is recommended to consult a medical professional for consultation and treatment.