Abstract: Objective:To study the incidence of congenital hypothyroidism in moderate-and high-risk neonates in NICU.
Methods:A total of 230 high-risk neonates were treated in NICU of No.8 Hospital of Baotou from June 2013 to June 2015.On 3～7 d after birth，the thyroid function was detected，including thyroxin，T3 and T4.According to the Diagnosis and Treatment Guidelines to Thyroid Diseases During and After Pregnancy published in 2012，the diagnosis was made and treatment was performed.
Results:There were 5 cases meeting the diagnosis standard of primary subclinical hypothyroidism，the positive detection rate being 1/46.
Conclusion:The proportion of congenital hypothyroidism cases in NICU is relatively high，and subclinical and temporary hypothyroidism is more common.Therefore it′s necessary to pay attention to screening and to follow the thyroid indexes，and proper treatment can be given in time of need.However，a larger sample is needed for clinical research to determine whether it can be regarded as a routine screening.

Key words: Congenital hypothyroidism, Screening for neonatal diseases, Primary subclinical hypothyroidism, Infant,newborn