"Hypothyroidism screening during first trimester of pregnancy".
María Castillo LaraÁngel Vilar SánchezConsuelo Cañavate SolanoEstefanía Soto PazosMaría Iglesias ÁlvarezCarmen González MacíasCarmen Ayala OrtegaLuis Javier Moreno CorralJuan Jesús Fernández AlbaPublished in: BMC pregnancy and childbirth (2017)
In our population, the TSH cutoff value for gestational SCH screening is 4.7 mIU/L. Using the SEGO recommended 2.5 mIU/L TSH cut-off point, the prevalence of SCH is 37%. Applying the ATA 2017 recommended cutoff point of 4 mIU/L, the prevalence of SCH is 9.6%. Finally, when the cut-off of 4.7 mIU/L (our 97.5th centile) was used, the SCH prevalence is 5%. TSH levels in the first trimester of pregnancy are not useful to detect TPO Ab.