A high tsh (thyroid stimulating hormone) level in early pregnancy can affect the fetus. Normally, a thyroid stimulating hormone (tsh) value of more than 2.5 mU/L in early pregnancy is considered high, which may affect the intellectual development of the fetus or increase the probability of miscarriage. A high thyroid stimulating hormone value indicates the presence of hypothyroidism in the pregnant woman, and in a state of persistent hypothyroidism, the neurovascular development of the fetus may be affected, thus increasing the risk of affecting fetal intelligence. In addition, high thyroid stimulating hormone will affect the uterine contraction, and the probability of miscarriage is easy to occur in early pregnancy, if the thyroid stimulating hormone is high in early pregnancy, it is necessary to carry on the treatment as soon as possible; avoid delaying the condition.