Thyroid Function Throughout Pregnancy in Women With Subclinical Hypothyroidism or Hypothyroxinemia.
Obstet GynecolJul 27, 2026 (epub)
Lauren H Theilen, Lisa Mele, Alan M Peaceman et al.
✦ AI-curated · Sources linked
In 30 seconds
This multicenter randomized controlled trial analyzed thyroid function in pregnant women with subclinical hypothyroidism or hypothyroxinemia. Among 326 women with subclinical hypothyroidism, 88.7% had at least one normal thyroid function test during pregnancy, while 61.4% of 254 women with hypothyroxinemia showed similar results (P < .001).
Key findings
- 88.7% of women with subclinical hypothyroidism had at least one normal thyroid function test result during pregnancy.
- 61.4% of women with hypothyroxinemia had at least one normal thyroid function test result during pregnancy.
- Overt hypothyroidism developed in only 2.5% of the subclinical hypothyroidism group and 2.0% of the hypothyroxinemia group.
Why it matters
Understanding the natural course of thyroid function in these populations can inform clinical decisions regarding the necessity of treatment, potentially reducing unnecessary interventions in women whose thyroid function may normalize spontaneously.