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Pregnancy may be affected by hyperthyroidism (an overactive thyroid gland). If possible, hyperthyroidism should be treated and brought under control before getting pregnant. If hyperthyroidism is uncontrolled, there is a high risk of complications of pregnancy.
Hypothyroidism means an underactive thyroid gland, which does not make enough thyroid hormone. A pregnant woman’s thyroid hormones are vital for her and for the development of her baby. There is an increased risk of complications in pregnancy if hypothyroidism is not carefully treated.