Description of thyroid disorders the year before conception: a population-based study

Objective This study aimed to monitoring the prevalence of previously identified thyroid disorders and hypothyroidism before pregnancy. Material methods A retrospective cross-sectional women whose pregnancies occurred between 2014 2016 was conducted, including 120,763 in Catalonia (Spain). The presence based on disease diagnostic codes and/or prescription levothyroxine or antithyroid drugs. To evaluate disorder diagnosis monitoring, thyrotropin (TSH), free T4 (FT4), antiperoxidase antibody (TPOAb), anti-TSH receptor (TRAb) records were gathered categorised according reference values each laboratory. Results recorded last menstrual period 5.09% for 0.64% hyperthyroidism,showing a significant increase with age. test not performed year approximately 40% known disorder. Amongst who underwent TSH test, 31.75% showed an above-normal result. unknown have disorders, 3.12% had elevated levels 0.73% low levels. Conclusion high percentage Catalan properly monitored during those monitored, more than one-third outside range. Therefore, it is important pre-pregnancy visits.