Trimester specific cut-offs for TSH

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1st trimester - 0.1 to 2.5 mIU/mL

2nd trimester - 0.2 to 3.0 mIU/mL

3rd trimester - 0.3 to 3.0 mIU/mL

Whereas in a non pregnant adult - >4.0 mIU/mL