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Generation of a Mouse Spontaneous Autoimmune Thyroiditis Model

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Published on: March 17, 2023

Periconceptional changes in thyroid function: a longitudinal study.

Ursula Balthazar¹, Anne Z Steiner

¹Anchorage Women's Clinic, Anchorage, AK, USA.

Reproductive Biology and Endocrinology : RB&E

|March 23, 2012

Summary

This summary is machine-generated.

Thyroid stimulating hormone (TSH) levels decrease from pre-pregnancy to early pregnancy. This change is less predictable in women with thyroid antibodies, impacting prenatal screening guidelines.

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Area of Science:

Endocrinology
Reproductive Medicine
Clinical Chemistry

Background:

Current understanding of thyroid function changes during the periconception window is limited.
This gap hinders optimal screening and diagnosis of thyroid disease in pregnant women.

Purpose of the Study:

To characterize thyroid function changes during the transition from pre-pregnancy to early pregnancy in fertile women.
To assess the influence of thyroid antibodies on these periconceptional thyroid function dynamics.

Main Methods:

Prospective observation of 60 women (ages 30-42) planning pregnancy.
Measurement of thyroid stimulating hormone (TSH) and free thyroxine (FT4) pre-conception and during early pregnancy (6-9 weeks gestation).
Analysis of pre-pregnancy thyroid antibodies and use of general estimating equation models for longitudinal analysis.

Main Results:

TSH levels were significantly higher pre-pregnancy compared to early pregnancy (p < 0.001), while FT4 levels remained stable (p = 0.53).
TSH declined with increasing gestational age (P < 0.01).
Women with thyroid antibodies exhibited higher pre-pregnancy TSH and more variable periconceptional thyroid function changes compared to antibody-negative women.

Conclusions:

TSH levels naturally decline during the periconception period.
Thyroid antibody status influences the predictability of TSH changes.
These periconceptional thyroid function shifts necessitate consideration in developing prenatal thyroid screening protocols.