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Thyroid function tests are rarely abnormal in patients with severe hyperemesis gravidarum.
R Wilson1, J H McKillop, M MacLean
1University Department of Medicine, Glasgow Royal Infirmary, UK.
Clinical Endocrinology
|October 1, 1992
Summary
This study found no consistent thyroid abnormalities in women with hyperemesis gravidarum, suggesting thyroid hormones and hCG do not cause the condition. Symptoms improved naturally as pregnancy progressed.
Area of Science:
- Endocrinology
- Obstetrics & Gynecology
Background:
- Hyperemesis gravidarum (HG) is a severe pregnancy complication with debated etiology.
- Thyroid dysfunction has been implicated as a potential cause of HG.
Purpose of the Study:
- To investigate thyroid hormone levels and related antibodies in women with hyperemesis gravidarum.
- To assess the role of human chorionic gonadotrophin (hCG) in the pathogenesis of HG.
Main Methods:
- The study included 10 hospitalized women with first-trimester HG and 50 healthy pregnant controls.
- Blood samples were analyzed for various thyroid hormones (TT3, TT4, FT4, TSH), antibodies (TRAb, TSAb, microsomal, thyroglobulin), and hCG levels.
Main Results:
- No consistent pattern of thyroid function test abnormalities was observed in the HG group.
- Thyroid hormone levels and hCG levels did not significantly differ between HG patients and controls.
- Individual patients showed some abnormal thyroid tests, but the group as a whole did not differ from healthy controls.
Conclusions:
- The findings suggest no underlying thyroid abnormality in patients with hyperemesis gravidarum.
- Thyroid hormones and hCG do not appear to contribute to the pathogenesis of HG.
- HG symptoms improved spontaneously as pregnancy advanced, irrespective of thyroid status.