Taking medication for hypothyroidism usually has no effect on pregnancy, but it is advisable to consult your doctor to maintain your thyroid function to normal levels before considering pregnancy. Hypothyroidism is caused by low levels of thyroid hormones. It should be treated with Levothyroxine Sodium tablets as advised by your doctor, which can also be used during pregnancy and usually has no adverse effects on the child. Hypothyroidism in pregnant women can have an effect on the baby. In early pregnancy, hypothyroidism in pregnant women can cause these manifestations such as preeclampsia, or even fetal arrest. By mid-pregnancy, if the pregnant mother’s thyroid function level is low, it may affect the baby’s intellectual development. Therefore, for patients with hypothyroidism, it is important to keep the thyroid function within the range required for pregnancy once they become pregnant, and it is best to keep it within the required range during the preparatory period. Seek medical attention when abnormal thyroid function is detected.