The study on urine iodine,milk iodine and thyroid function of breast feeding women after iodine supplementation in iodine deficiency area

Objective To investigate the metabolic states on iodine in breast feeding women taking qualified iodine salt in iodine deficiency area within half a year after delivery.Methods Determination of milk iodine,urine iodine and thyroid function.Results Urine iodine on delivery was 115.28~913.02μg/L.Median of urine iodine was 423.58μg/L.Urine iodine level of 90% of the mothers dropped gradually in half a year after delivery because of low iodine salt intake,and meanwhile the urine iodine level of infants changed correspondingly.The milk iodine level always kept in high level.The level of TT 4 in some parturients were a little high.It showed that the thyroid function of parturients increased compensatorily before and after delivery.Conclusions The iodine level of breast feeding women was basically normal by way of taking qualified iodine salt.But some factors (such as eating,living conditions) may cause that the urine iodine level about 20% of the mothers were a little low. [