Low free thyroxine and high thyrotropin in pregnant women can be treated with medications such as levothyroxine sodium tablets. In pregnancy, some pregnant women experience symptoms of hypothyroidism due to the demand for thyroid hormones by the fetus, which rises sharply in early pregnancy. Some pregnant women have hypothyroidism before pregnancy itself but do not undergo a systematic medical checkup and therefore it is not detected. In hypothyroidism, free thyroxine will be low and thyrotropin will be high. Patients can be treated with medications such as levothyroxine sodium tablets and thyroxine supplementation. Pregnant women with low free thyroxine and high thyrotropin are advised to seek prompt medical attention to confirm the diagnosis and follow the doctor’s instructions.