Association between previously unknown connective tissue disease and subclinical hypothyroidism diagnosed during first trimester of pregnancy

Antinuclear antibodies; pregnancy; subclinical hypothyroidism; Adult; Antibodies, Antinuclear; Asymptomatic Diseases; Autoimmune Diseases; Biomarkers; Case-Control Studies; Connective Tissue Diseases; Female; Humans; Hypothyroidism; Predictive Value of Tests; Pregnancy; Pregnancy Complications; Risk Factors; Thyroid Function Tests; Thyroid Hormones; Pregnancy Trimester, First; Obstetrics and Gynecology; Reproductive Medicine; Medicine (all)