[Thyroid hormone levels during pregnancy, labor and puerperium].

Concentration of thyroxine triiodothyronine and reverse-triiodothyronine in serum blood of 30 pregnant women were estimated, like a longitudinal study from 5 to 41 week of pregnancy. Significant increase of concentration of all hormones was observed. We presented also estimation of iodothyronines in blood serum in labor and non-complicated puerperium. We found increase of T3 concentration immediately after delivery, and decrease of level of all hormones in puerperium.