Lege Artis Medicinae

[Thyroid disorders during pregnancy]

HAJNÁCZKY Károly

DECEMBER 21, 2011

Lege Artis Medicinae - 2011;21(12)

[The hormones of the thyroid gland play a basic role in human reproduction and in the early development of the fetal brain, too. The frequency of hypo- and hyperthyroidism occuring in a pregnancy is between 1-2 per cent. Abnormal maternal thyroid function could result in harmful effects for both the mothers and their offsprings. An illness (gestational throphoblast disease) that is known to have an influence on the maternal thyroid function. Thyroid diseases occuring in pregnancy can result in diagnostical problems: the existing complaints and symptoms may be misdiagnosed as a consequence of pregnancy. Because of the changes in thyroid metabolism, which are typical to pregnancy, the analysis of the results of thyroid function may be difficult. Several diagnostical and therapeutical procedures (i. e. radioiodine techniques) are absolutely contraindicated during pregnancy. In the case of thyroid hormone replacement therapy one must take into consideration the continously changing maternal demand. Propylthiouracil is the choice of therapy regarding the treatment of the hyperthyreoidism during pregnancy. The incidence of thyroid cancer in pregnancy is 1 per 1000. Pregnancy itself does not appear to increase the risk of malignant tranformation or alter the course of thyroid cancer. The preferred period of the surgical intervention of the thyroid gland is the second trimester of the pregnancy. The introduction of a thyroid functional test (thyroid-stimulating hormone) as a screening method in the first trimester would be advisable in our country. Achieving this new procedure would reflect and expand a way of thinking in respect of prevention in our pregnancy care practice.]

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