Is subclinical hypothyroidism a risk factor for gestational diabetes mellitus?

Objective: Gestational diabetes mellitus is characterized by increased blood sugar that first appears during pregnancy. Multiple articles
 have described a relationship between hypothyroidism/subclinical hypothyroidism (SCH) and rise in the risk of concomitant
 pregnancy complications, including gestational (GDM), but effect SCH on uncertain the
 literature. We clarified contribution to GDM development.
 Patients Methods: conducted retrospective study. From patient records, 250 pregnant women who applied our
 hospital for screening at 20-24 weeks had glucose tolerance tests were included our Retrospectively, all these pregnant
 women’s first-trimester thyroid-stimulating hormone (TSH) levels recorded. created two groups according oral glucose
 test (OGTT) results: case group diagnosed with control average glucose. Their first-trimester
 TSH compared defined whether they euthyroid, subclinical (TSH=2.5-
 5.5mIU/L) or overt (TSH >5.5).
 Results: 37 191 patients (19.4%) GDM. When we checked groups, mean was 1.8 mIU/L, 1.7 difference not statistically significant (p=0.121). 24.32%
 (n=9) hypothyroidism/hypothyroidism; this rate as low as
 14.93% (n=28) non-GDM group, no statistical found (p=0.21).
 Conclusion: It can be predicted other accompanying factors may primary determinant development rather
 than hypothyroidism. Risk scales include trimester level should established of