Study on urine iodine,milk iodine and the size and function of thyroid glands in lactating women and their infants

Objective To investigate the iodine status of women during pregnancy and lactation and their in-fants.Methods Detection of urine iodine,milk iodi ne,the size and function of thyroid g lands in 105lactating women and 30of their infants.Result The median of urine iodine and milk io dine of delivery women was 489.74μg /L and 372.05μg /L respective-ly.The thyroid size was 8.74±2.86ml by ultrasonography.The TSH level in neonatals was 4.24±2.96mU /L.The ur ine level in pregnant women who took some iodine -containing food was higher than that in women who took non -iodine -containing food.The median of urine iodine of in fants was 293.96μg /L.Those infants can regulate their iodine level to certain extent when their mother' s urine iodine fluctuated.Conclusion The iodine level in pregnant and lactating women can be maintained to nor-mal level by taking qualified iodine salt.It is better for those women to t ake some iodine -containing food additionally.The iodine in infants comes from their mother an d it can be regulated to some extent by themselves.But excessively low or h igh iodine level may interfere with their developmen t.It is suggested that the urine level during pregnancy and lactation be maintained at 200～1000μg /L.