Thyroid disease

Gestation-suppressed serum TSH levels during early pregnancy are not associated with altered maternal and neonatal outcomes

Eur Thyroid JPublished Retrospective cohort study

Authors' conclusion

Suppressed serum TSH levels during the first to early second trimester of pregnancy were not associated with altered maternal or neonatal outcomes.

Study context

Population
Pregnant women screened at 11.8 ± 2.4 weeks for TSH, free T4 (FT4) and TPOAb; excluded twin and assisted-reproduction pregnancies, TSH >3.74 mIU/L, severe hyperthyroidism, treated thyroid dysfunction, sampling <6 or >16 weeks
Participants
1,081 women
Exposure
Suppressed TSH vs euthyroid controls in early pregnancy
  • sTSHn = 36
  • Controlsn = 1,045reference
Outcome
Prevalence of adverse maternal and neonatal pregnancy outcomes
Methodological detailssingle-centre, logistic regression adjusted for TAI, FT4 and demographic parameters
  • Single-centre
  • Logistic regression adjusted for TAI, FT4 and demographic parameters

Main finding

As reported in the abstract

Adverse maternal and neonatal pregnancy outcomes
Each group vs controlsEstimate (95% CI)P value
sTSH
aOR (iron deficient anaemia) 1.41(0.64–2.99)
P = 0.385
sTSH
aOR (GDM) 1.19(0.44–2.88)
P = 0.713
sTSH
aOR (preterm birth) 1.57(0.23–6.22)
P = 0.574
sTSH
aOR (low Apgar-1' score) 0.71(0.11–2.67)
P = 0.657

Observational data: associations, not effects.

Further findings

Serum TSH

P < 0.001

FT4

P < 0.001

TPOAb positivity (TAI)

P = 0.803

OutcomesTSHControls
TRAb positivity0 events— not stated in the abstract

— not stated in the abstract

Original publication

Gestation-suppressed serum TSH levels during early pregnancy are not associated with altered maternal and neonatal outcomes. Eur Thyroid J. Published 18 October 2023. doi:10.1530/etj-23-0112

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