Thyroid Function and Autoimmunity Versus Number of Pregnancies.

Area of Science:

• Endocrinology
• Reproductive Medicine
• Immunology

Background:

• Thyroid autoimmunity is potentially linked to infertility.
• The reciprocal relationship between thyroid autoimmunity and pregnancy requires further investigation.

Purpose of the Study:

• To assess the relationship between thyroid autoimmunity and pregnancy outcomes.
• To investigate if pregnancy influences the development of thyroid autoimmunity.

Main Methods:

• Retrospective evaluation of thyrotropin (TSH) and antithyroid peroxidase autoantibodies (anti-TPO) in 444 Greek women over eight years.
• Statistical analysis included ANCOVA and Chi square test.

Main Results:

• TSH levels varied based on pregnancy history: higher in women with one pregnancy and lower in those with multiple pregnancies compared to nulliparous women.
• Anti-TPO positivity was significantly more prevalent in women with no pregnancies compared to those with one or more pregnancies.

Conclusions:

• Pregnancy may contribute to the development of thyroid autoimmunity.
• Women should undergo long-term monitoring for thyroid autoimmunity post-pregnancy, even after uncomplicated pregnancies.