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TSH in Pregnancy
First trimester: Second trimester: Third trimester:
0.1 – 2.5 mU/mL 0.2 – 3.0 mU/mL 0.3 – 3.0 mU/mL
SLIDE 6
Thyroid Hormones in Pregnancy
● Fetal thyroid concentrates iodine @ 10 wks
● Fetal TSH and T4 appear @ 11-12 wks
● Increased TSH, T4, T3 at 20 weeks
SLIDE 7
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