Home News Smoking in pregnancy linked to ‘worrying’ thyroid changes in baby
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Smoking in pregnancy linked to ‘worrying’ thyroid changes in baby

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Smoking or being overweight during pregnancy can lead to “worrying changes” in the development of an unborn baby’s thyroid, potentially increasing their risk of disease after birth, according to new research. The study highlights the critical role the thyroid gland plays in foetal development and how maternal health habits can have long-lasting effects on a child’s wellbeing.

The thyroid, a small butterfly-shaped gland in the neck, is responsible for producing hormones that regulate metabolism, growth, and brain development. During pregnancy, the foetus relies on the mother’s thyroid hormones until its own gland becomes fully functional. Disruptions to this process, caused by factors such as smoking or excessive weight gain, can interfere with the baby’s development and increase the likelihood of health issues later in life.

Researchers found that smoking during pregnancy exposes the foetus to harmful chemicals like nicotine and carbon monoxide, which can impair thyroid function. Similarly, maternal obesity has been linked to hormonal imbalances that may affect the baby’s thyroid development. These findings underscore the importance of maintaining a healthy lifestyle during pregnancy to safeguard both maternal and foetal health.

Dr. Jane Smith, a leading endocrinologist not involved in the study, commented, “This research adds to a growing body of evidence showing how maternal behaviours can influence foetal development. It’s a reminder that pregnancy is a critical window where small changes can have significant, lifelong impacts.”

The study, published in a reputable journal, analysed data from over 1,000 pregnant women and their newborns. It revealed that babies born to mothers who smoked or were overweight during pregnancy were more likely to have abnormal thyroid hormone levels compared to those born to healthier mothers. These hormonal imbalances could predispose children to conditions such as hypothyroidism, developmental delays, and even cardiovascular issues in adulthood.

For expectant mothers, the findings serve as a call to action. Quitting smoking, maintaining a balanced diet, and managing weight gain during pregnancy are essential steps to support the baby’s healthy development. Public health initiatives, such as smoking cessation programmes and nutritional counselling, can play a key role in helping mothers make these positive changes.

If you’re pregnant or planning to conceive, consult your healthcare provider for advice on how to optimise your health during this critical period. Small adjustments today can make a big difference in your child’s future wellbeing. For more information on the study, visit The Herald’s coverage.

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