Thyroid problems pregnancy. Thyroid problems during pregnancy can appear as either too much or too little thyroid hormone. Too much thyroid hormone, hyperthyroidism, results in a faster metabolism; it is usually caused by Graves' disease. The problem is often treated by surgery or medication to reduce the amount of thyroid hormone in your system. If left untreated during pregnancy, there is a higher risk of premature delivery and low birthweight. If treatment is necessary during pregnancy, there are safe medications you can take. Too little thyroid hormone, hypothyroidism, is usually caused by autoimmune problems; the thyroid gland is damaged by your own antibodies. Doctors treat this problem with thyroid hormones. If left untreated, you may suffer from infertility or have a miscarriage. If you have either thyroid problem, you should be tested before pregnancy to determine the correct amount of medication for you. Pregnancy can change medication requirements, so you will also need to be checked during pregnancy.
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