Women with autoimmune thyroid disease plus at least one other autoimmune condition — known as thyroid-related polyautoimmunity — face a significantly higher risk of premature ovarian insufficiency (POI) and early menopause compared to women with isolated thyroid disease or non-autoimmune endocrine disorders. A retrospective study of 7,690 postmenopausal women published in Frontiers in Endocrinology highlights just how steep that risk gap can be.

The findings also revealed a notably higher rate of first-trimester miscarriage in the polyautoimmunity group, and a family history of autoimmune disease emerged as the strongest independent risk factor for POI in these women.

By the Numbers:

• 5.92% — POI prevalence in women with thyroid-related polyautoimmunity
• 1.84% — POI prevalence in women with isolated autoimmune thyroid disease
• 1.16% — POI prevalence in women with non-autoimmune endocrine disorders
• 7.23% vs. ~1% — early menopause rate in polyautoimmunity group vs. both comparison groups
• 3.61% vs. ~0.5–0.7% — first-trimester miscarriage rate in polyautoimmunity group vs. others

Why it matters: For clinicians, these findings underscore the importance of proactively assessing ovarian reserve in young women with thyroid-related polyautoimmunity — especially those with a family history of autoimmune disease — so fertility preservation options can be explored before it's too late.