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Amenorrhea with low normal thyroid function and thyroxine treatment.

P Ylöstalo, P Kujala, K Kontula

    International Journal of Gynaecology and Obstetrics: the Official Organ of the International Federation of Gynaecology and Obstetrics
    |January 1, 1980
    PubMed
    Summary
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    Thyroxine treatment may help restore menstrual cycles in women with functional amenorrhea and low-normal thyroid function. This study observed improved outcomes in patients receiving thyroxine compared to those who did not.

    Area of Science:

    • Endocrinology
    • Reproductive Medicine

    Background:

    • Functional amenorrhea is a condition affecting reproductive-aged women.
    • Subtle thyroid dysfunction can be associated with menstrual irregularities.

    Purpose of the Study:

    • To investigate the efficacy of thyroxine treatment in patients with functional amenorrhea and low-normal thyroid function.
    • To assess the impact of thyroxine on hormonal profiles and menstrual cycle restoration.

    Main Methods:

    • A cohort study comparing patients with functional amenorrhea receiving thyroxine treatment versus a control group.
    • Hormonal levels (thyroxine, free thyroxine index, testosterone, estradiol, prolactin, FSH, LH) were monitored.
    • Thyroid-releasing hormone/luteinizing-releasing hormone tests were performed.

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    Main Results:

    • Menstrual cycles were restored in 10/17 patients with thyroxine treatment, versus 4/11 controls.
    • Thyroxine treatment elevated thyroxine and free thyroxine index levels and decreased testosterone.
    • No significant changes were noted in estradiol, prolactin, FSH, or LH levels; TSH response to TRH/LHRH was suppressed.

    Conclusions:

    • Thyroxine treatment appears beneficial for some amenorrheic patients with low-normal thyroid function.
    • Further research is warranted to identify specific patient subgroups who may benefit most from thyroxine therapy.