icantly lower TSH than normal or high birth weight in one of the studies.[ 8 ] Maternal comorbidities, birth weight, and gestational age did not have significant effect on CBTSH level in the present study, findings correlating with previous studies.[ 8 10 ] However; in one study, CBTSH level showed an increasing trend with maternal age.[ 11 ] Researchers have used different CBTSH cut-off levels ranging from 10 to 20 μIU/mL for recall and rescreening, to make it more cost-effective.[ 5 7 8 10 11 ] The kit cut-off values were used in the present study as there were no normative data for the local population.
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Effect of maternal and neonatal factors on cord blood thyroid stimulating hormone.
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