Recurrent pregnancy loss (RPL) remains one of the most challenging issues in reproductive medicine, affecting up to 5% of women of reproductive age [1]. Despite the multifactorial nature of the condition, growing evidence indicates that endocrine and endometrial factors play a decisive role in recurrent early miscarriages [2]. Among endocrine causes, thyroid dysfunction, particularly hypothyroidism, has been increasingly recognized as a key contributor to reproductive failure [3,4].

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