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ORIGINAL ARTICLE
Year : 2018  |  Volume : 8  |  Issue : 1  |  Page : 41-43

Abortion may be associated with elevated risk of future hypothyroidism


Department of Medicine, Dr. RPGMC, Kangra, Tanda, Himachal Pradesh, India

Correspondence Address:
Dr. Vivek Chauhan
Department of Medicine, Dr. RPGMC, Kangra, Tanda, Himachal Pradesh
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/IJCIIS.IJCIIS_43_17

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Objective: Fetal microchimerism during pregnancy and abortion has been linked with autoimmune hypothyroidism in females. We conducted a case–control study to investigate the odds of “abortion in the past” in the newly diagnosed hypothyroid females compared to their age-matched euthyroid controls. Methods: All consecutive newly diagnosed hypothyroid females, over 1 year, were enrolled as cases. Age-matched euthyroid controls were selected from the same region. The exposure variable tested was “past history of abortion (elective or therapeutic).” Results: Totally, 120 cases and 172 controls were recruited over 1 year with a mean age of 42.2 ± 9.8 years and 41.1 ± 12.4 years, respectively. The exposure variable (abortion) was present in 71 (59%) cases and 10 (6%) controls. Odds ratio (OR): 23.5 (12.2–48.9) P < 0.0001. Autoimmunity, based on thyroid peroxidase (TPO) positivity (TPO levels ≥30 U/ml), was present in 92 (77%) of the cases; TPO was negative in 28 (33%) of cases. The exposure variable was documented in 62.4% and 50% of TPO positive and negative cases, respectively (P = 0.28). Discussion and Conclusion: The study suggests that abortion (elective or therapeutic) in the past is strongly associated with newly diagnosed hypothyroidism in females aged 42.2 ± 9.8 years; OR: 23.5 (P < 0.0001). Interestingly, abortion was associated with both, TPO positive and negative hypothyroidism.


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