Thyroid function before and after induced abortion in normal pregnant women

Area of Science:

• Endocrinology
• Reproductive Medicine
• Obstetrics & Gynecology

Background:

• Thyroid function is altered during normal pregnancy.
• Human chorionic gonadotropin (hCG) shares structural similarities with thyroid-stimulating hormone (TSH).
• The direct impact of hCG on maternal thyroid function requires further elucidation.

Purpose of the Study:

• To investigate the effect of induced abortion on maternal thyroid function.
• To explore the relationship between hCG levels and thyroid hormones post-abortion.

Main Methods:

• Assessed thyroid function (TSH, FT4) in 25 pregnant women before and 1 week after induced abortion.
• Measured serum hCG-beta levels concurrently.
• Analyzed correlations between hCG-beta, TSH, and FT4.

Main Results:

• Serum TSH significantly increased (P < 0.02) and hCG-beta significantly decreased (P < 0.001) 1 week after induced abortion.
• A negative correlation was found between hCG-beta and TSH (P < 0.02).
• A positive correlation was observed between hCG-beta and FT4 before abortion (P < 0.02).

Conclusions:

• hCG appears to stimulate the maternal thyroid gland during pregnancy, potentially overriding TSH.
• The reduction in hCG following induced abortion influences TSH levels.
• These findings highlight the significant role of hCG in modulating thyroid function during pregnancy.