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Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model
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What affects functional ovarian reserve, thyroid function or thyroid autoimmunity?

Andrea Weghofer1,2, David H Barad3,4,5, Sarah Darmon3

  • 1Department of Obstetrics and Gynecology, Medical University Vienna, Vienna, Austria. andrea.weghofer@meduniwien.ac.at.

Reproductive Biology and Endocrinology : RB&E
|May 12, 2016
PubMed
Summary
This summary is machine-generated.

Lower thyroid-stimulating hormone (TSH) levels within the normal range are linked to better functional ovarian reserve (FOR) in infertile women. This suggests thyroxine supplementation may improve FOR in those with TSH levels ≥3.0μIU/mL.

Keywords:
Anti-Müllerian hormone (AMH)InfertilityOvarian reserveThyroid autoimmunityThyroid functionThyroid stimulating hormone (TSH)

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Area of Science:

  • Reproductive Endocrinology
  • Thyroidology
  • Infertility Research

Background:

  • Thyroid dysfunction is a common endocrine disorder in women of reproductive age, often linked to infertility.
  • The impact of thyroid function versus autoimmunity on functional ovarian reserve (FOR) remains debated.
  • FOR is assessed by anti-Müllerian hormone (AMH) levels, reflecting the ovarian follicle pool.

Purpose of the Study:

  • To investigate if thyroid function, independent of thyroid autoimmunity, influences FOR in infertile women.
  • To determine the association between TSH levels and AMH within the normal TSH range (0.4-4.5μIU/mL).

Main Methods:

  • Studied 225 infertile women, measuring AMH and TSH levels.
  • Stratified participants into TSH <3.0μIU/mL and TSH ≥3.0μIU/mL groups.
  • Adjusted analyses for thyroid autoimmunity and age.

Main Results:

  • Women with TSH <3.0μIU/mL had significantly higher AMH levels compared to those with TSH ≥3.0μIU/mL (P=0.03).
  • This association remained significant after adjusting for thyroid autoimmunity and age (P=0.02).
  • Mean age was 38.4±5.0 years, mean AMH 1.3±2.0 ng/mL, and mean TSH 1.8±0.9 μIU/mL.

Conclusions:

  • Lower TSH levels (<3.0μIU/mL) within the euthyroid range are associated with better FOR (higher AMH) in infertile women.
  • This suggests a potential direct benefit of lower TSH on follicular recruitment.
  • Further research into thyroxine supplementation for infertile women with TSH ≥3.0μIU/mL is warranted to improve FOR.