Risk Factors for Postpartum Thyroid Dysfunction in Euthyroid Women Prior to Pregnancy.

Area of Science:

• Endocrinology
• Reproductive Health
• Thyroidology

Background:

• Postpartum thyroid dysfunction (PPTD) is a common condition with predisposing factors that may be population-specific.
• Identifying these factors is crucial for targeted screening and management in euthyroid women prior to pregnancy.

Purpose of the Study:

• To evaluate the risk factors associated with the development of postpartum thyroid dysfunction (PPTD).
• To identify specific predictors for PPTD in euthyroid women before pregnancy.

Main Methods:

• A case-control study involving 45 women with PPTD and 55 age-matched euthyroid postpartum controls from Plovdiv, Bulgaria.
• Thyroid function tests (TSH, FT4, FT3), thyroid autoantibodies (TPOAb, TgAb, TRAb), and thyroid ultrasound were performed during early pregnancy and postpartum.
• Multivariate logistic regression analysis was used to identify independent risk factors.

Main Results:

• Significant risk factors for PPTD included family history of thyroid disease (OR 4.42), smoking (OR 4.01), personal history of autoimmune thyroid disease (OR 5.37), positive TPOAb (OR 18.12), thyroid ultrasound hypoechogenicity (OR 6.39), and levothyroxine use during pregnancy (OR 3.69).
• Women with PPTD had a significantly lower pre-pregnancy BMI (22.80±0.55) compared to controls (26.25±0.97).
• Independent risk factors identified were TPOAb positivity, family history of thyroid disease, smoking, and lower pre-pregnancy BMI.

Conclusions:

• Several factors are associated with an increased risk of PPTD in the studied population.
• Screening for thyroid disorders in women with identified risk factors may be beneficial for early detection and intervention.