World Thyroid Day is observed annually on May 25 to raise awareness about thyroid disorders and the importance of thyroid health. The day highlights the growing global burden of thyroid-related conditions, with the Indian Thyroid Society estimating that nearly 42 million people in India are currently affected by thyroid disorders. The thyroid gland, located at the front of the neck, plays a vital role in regulating metabolism and controlling several essential bodily functions through hormone production.

Health experts emphasize that thyroid function becomes even more critical during pregnancy, as thyroid hormones are essential for foetal growth and neurological development. According to endocrinologists, uncontrolled thyroid conditions—particularly hypothyroidism—during pregnancy may be associated with an increased risk of developmental disorders in children, including autism spectrum disorder (ASD). Medical specialists note that thyroid hormones are especially important in the first trimester, when the foetus is most dependent on maternal hormone supply.

Doctors explain that insufficient or poorly managed thyroid hormone levels during pregnancy can interfere with brain development in the developing baby. Several studies over the years have explored a possible association between maternal hypothyroidism and neurodevelopmental conditions such as autism. While the research continues, experts stress that the severity and duration of untreated hypothyroidism are key factors influencing potential risks.

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However, specialists also caution that the findings should not cause undue fear among expectant mothers. The increased risk is largely linked to untreated or poorly controlled thyroid conditions, while women who are diagnosed early and maintain proper treatment generally have healthy pregnancy outcomes. Regular monitoring of thyroid-stimulating hormone (TSH) levels during pregnancy is considered essential, as hormone requirements can change across trimesters.

Treatment for hypothyroidism during pregnancy typically includes thyroid hormone replacement therapy, most commonly levothyroxine. Doctors recommend routine TSH testing to ensure levels remain within the target range for both maternal health and foetal development. Symptoms of thyroid dysfunction—such as fatigue, constipation, dry skin, and hair loss—can sometimes overlap with normal pregnancy changes, making regular screening especially important.

Medical experts further advise women with a history of thyroid disease, fertility issues, or previous pregnancy complications to undergo thyroid evaluation before conception. While autism spectrum disorder is influenced by multiple genetic and environmental factors, maintaining good maternal health, including proper thyroid management, is considered an important preventive measure for supporting healthy pregnancy outcomes.

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