Transient postpartum thyroid disorder typically presents as which pattern?

Transient postpartum thyroid disorder typically presents as which pattern?

• A. Mild hyperthyroidism for 2-4 months, followed by hypothyroidism, usually stabilizing within one year postpartum
• B. Persistent hyperthyroidism postpartum
• C. Hypothyroidism postpartum
• D. No thyroid changes postpartum

Answer: (A)

This pattern reflects transient postpartum thyroiditis, which is commonly immune-mediated and occurs in the first year after childbirth. It usually starts with a brief hyperthyroid phase caused by leakage of thyroid hormone from the inflamed gland, lasting about 2 to 4 months. This is followed by a hypothyroid phase as hormone stores are depleted. Most women then return to normal thyroid function within roughly a year postpartum. This course is distinct from persistent hyperthyroidism postpartum (which would suggest a longer-lasting, non-self-limited hyperthyroid state), from isolated hypothyroidism postpartum (which would not include an initial hyperthyroid phase), or from no thyroid changes postpartum (which is inconsistent with the common inflammatory course seen).

This pattern reflects transient postpartum thyroiditis, which is commonly immune-mediated and occurs in the first year after childbirth. It usually starts with a brief hyperthyroid phase caused by leakage of thyroid hormone from the inflamed gland, lasting about 2 to 4 months. This is followed by a hypothyroid phase as hormone stores are depleted. Most women then return to normal thyroid function within roughly a year postpartum.

This course is distinct from persistent hyperthyroidism postpartum (which would suggest a longer-lasting, non-self-limited hyperthyroid state), from isolated hypothyroidism postpartum (which would not include an initial hyperthyroid phase), or from no thyroid changes postpartum (which is inconsistent with the common inflammatory course seen).