The thyroid function of 28 newborn in fants was studied by the uptake of I131 by the thyroid gland.

The range of I131 uptakes was from 6.3 to 36.4% with a mean of 20.3% (standard deviation is 8.5%). Fourteen of the cases were within one standard deviation of the mean and all cases were within two standard deviations.

In this study sex and weight were not found related to thyroid function.

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