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What endocrine disorders cause weight gain?

The most common culprits for unexplained weight gain are Hypothyroidism (underactive thyroid), PCOS, Cushing’s Syndrome (excess cortisol), and Insulin Resistance.

Medically Reviewed Content
Medically Reviewed
By Ferty9 Medical Board, at Ferty9 Fertility Center | Last Reviewed: Feb 25, 2026
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