When Should Pregnant Women Have Their Thyroid Tested?
Thyroid hormones have a significant impact on the course of pregnancy, fetal development, and labor. During the first 12 weeks of pregnancy, the fetus does not have a thyroid gland, so it receives the necessary thyroid hormones from the mother through the placenta. Checking thyroid hormone levels is important for women who are planning to become pregnant. Women planning to become pregnant should have TSH levels below 2.5 μIU/L. If a pregnant woman has a deficiency of thyroid hormones, this increases the risk of miscarriage, placental abruption, and premature birth, and can also lead to delayed mental and physical development of the newborn. Therefore, it is important to check thyroid hormone levels in women who are planning to become pregnant or are already pregnant.