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A study published in Clinical Endocrinology finds evidence that low levels of the thyroid hormone called thyroxine may be associated with more posterior positioned babies. While the 3 Principles are often effective in correcting malposition, there are occasional women whose babies do not respond, or respond in the amount of time the mother has after finding out her baby is posterior. This may be helpful information. In addition, it may be helpful to have your thyroid levels checked in pregnancy. The New England Journal of Medicine suggests a type of iodine supplementation in pregnancy.

 

From BBC News online

Excerpts from the 23 December 2009 article:  Too little of the hormone thyroxine is already known to complicate pregnancy, increasing the risk of miscarriage, premature birth and pre-eclampsia.

Now a Dutch team has found...Babies were more often positioned wrongly, making labour more difficult. Although still head down, the babies tended to face the wrong way - towards their mother's back rather than stomach.

Not only are these labours generally longer and harder, they are also more likely to end in an assisted delivery with forceps, ventouse or a Caesarean.

The researchers from the University of Tilburg believe the hormone problem is so common - affecting about one in 10 pregnancies - a blood test for it should become a routine part of the antenatal check.

In their study of nearly 1,000 apparently healthy mums-to-be, lower levels of thyroxine at 36 weeks of pregnancy was strongly linked to abnormal positioning of the baby's head and risk of assisted delivery.

Professor Victor Pop and his team believe the relative lack of hormone might stop the unborn child moving as well as it should.

This means that instead of getting into the optimal position for labour, the baby is stuck in a more awkward one.

Professor John Lazarus, an expert in endocrinology at Cardiff University School of Medicine, said the link found was not necessarily causal.

"However it does highlight the importance of checking thyroid hormone levels in pregnancy."

 

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