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本文采用硫酸铈法测定了６１０５例孕妇的尿碘。孕周与平均尿碘间服从于ｂ２＞０的抛物线方程；孕周与缺碘频率间服从于ｂ２＜０的抛物线方程。结果揭示了孕期尿碘变化规律，为本地区缺碘孕妇期补碘的剂量、时间的掌握提供了依据。
Urinary iodine was measured in 6105 pregnant women using cerium sulfate method. The gestational age and mean urinary iodine obey the parabolic equation with b2> 0; the parabolic equation with gestational age and iodine deficiency obeys b2 <0. The results revealed the regularity of urinary iodine during pregnancy, which provided the basis for the dosage and time of iodine deficiency pregnant women in this area.