Association of Gestational Free and Total Triiodothyronine With Gestational Hypertension, Preeclampsia, Preterm Birth, and Birth Weight: An Individual Participant Data Meta-analysis.

Interestingly, a lower TT3 was associated with a higher risk of very preterm birth (<32 weeks) and there was a similar direction for the association of FT3 with very preterm birth, although this association failed to reach statistical significance.

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