Late offspring effects of antenatal thyroid screening

Area of Science:

• Obstetrics and Gynecology
• Endocrinology
• Pediatric Neurology

Background:

• Thyroid dysfunction in pregnancy is linked to adverse offspring outcomes.
• Mild thyroid dysfunction may cause long-term cognitive and behavioral effects in children.

Purpose of the Study:

• To review observational studies and critically appraise RCTs on antenatal thyroid screening and levothyroxine intervention.
• To clarify the impact of maternal thyroid dysfunction on offspring neurodevelopment and maternal metabolic health.

Main Methods:

• Literature review of observational studies.
• Critical appraisal of randomized controlled trials (RCTs).

Main Results:

• Overt hypothyroidism and hyperthyroidism in pregnancy pose significant risks to offspring.
• Associations between subclinical hypothyroidism, hypothyroxinemia, and neurodevelopmental issues (e.g., ADHD, autism) are debated.
• Maternal thyroid dysfunction correction improved maternal metabolic profiles.

Conclusions:

• Overt thyroid dysfunction in pregnancy must be corrected.
• The role of subclinical thyroid dysfunction and hypothyroxinemia in offspring neurodevelopment requires further investigation.
• Future trials should focus on early antenatal screening and intervention to assess long-term maternal and offspring effects.