As we have had a few pregnancy-related questions, the following snippet - and the link to the full article - leapt out at me. I quote from the American Thyroid Association's regular newsletter - Thyroid Weekly July 14, 2010.
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Pregnant women with TSH levels higher than 2.5 IU/L during the end of gestation are at risk for breech presentation, and obstetrical complications
Breech presentation at term is the most common abnormal fetal presentation, and it is associated with neonatal and maternal morbidity and mortality. There are many factors associated with breech presentation, including, among other causes, prematurity, low birth rate, primiparity, and smoking during pregnancy. The objective of this study was to evaluate the relationship between suboptimal maternal thyroid function during gestation and breech presentation at term.
All the best
[ Edited by helvella to fix link that was no longer working. And fettled some formatting. ]