Currently in France, screening for congenital hypothyroidism (CH) in premature infants is done by a single TSH assay on filter paper. However, European recommendations advise repeating the assay within the first month of life.
Our primary objective is to estimate the incidence of CH in preterm infants under 32 weeks of gestational age by applying the European recommendations.
Newborns born prematurely between 23 and 32 weeks of gestational age (up to 31 weeks and 6 days), both female and male, of all ethnic origins, regardless of birth weight, and including all other pathologies.
Newborns whose parents have given their non-opposition consent.
Newborns born who leave the region before day 15.
Newborns who die before 15 days of age.
Newborns whose parents are not affiliated with the social security system.