目的:探讨妊娠早中期持续孤立性低甲状腺素血症对妊娠期并发症及不良结局的影响。方法:回顾性分析2016年4月至2017年4月在本院产科分娩的妊娠早中期持续孤立性低甲状腺素血症孕妇111例，选取同期妊娠期甲状腺功能正常孕妇673例作为对照组，分析2组妊娠期并发症及不良结局。结果:妊娠早中期持续孤立性低甲状腺素血症组的年龄、孕前体重、体重指数(BMI)、口服糖耐量试验1 h血糖、2 h血糖均大于或者高于妊娠期甲状腺功能正常组(n P0.05)。n Logistic回归分析显示，年龄(n OR＝1.1, 95%n CI 1.0~1.1，n P＝0.002)、孕前体重(n OR＝1.0，95%n CI 1.0~1.1，n P＝0.046)是妊娠早中期持续孤立性低甲状腺素血症发生的危险因素。而妊娠早中期持续孤立性低甲状腺素血症与妊娠期贫血相关(n OR＝1.9，95%n CI 1.1~3.2，n P＝0.024)。n 结论:妊娠年龄较大及妊娠前体重较重的孕妇需要关注甲状腺功能，妊娠早中期持续孤立性低甲状腺素血症的孕妇需要关注是否存在贫血。“,”Objective:To investigate the effects of persistent isolated hypothyroxinemia in the first and second trimester of pregnancy on complications and adverse outcomes of pregnancy.Methods:A retrospective analysis was conducted in 784 pregnant women including 111 cases of persistent isolated hypothyroxinemia in the first and second trimester of pregnancy and 673 pregnant women with normal thyroid function as control group. All women were registered and delivered in the Department of Obstetrics of our hospital from April 2016 to April 2017. The complications and adverse outcomes of pregnancy in the two groups were analyzed.Results:Age, body weight before pregnancy, body mass index(BMI), 1 h plasma glucose and 2 h plasma glucose during oral glucose tolerance test in persistent isolated hypothyroxinemia group were higher than those in control group(n P0.05). Logistic regression analysis showed that age(n OR=1.1, 95%n CI 1.0-1.1, n P=0.002) and pre-pregnancy body weight(n OR=1.0, 95%n CI 1.0-1.1, n P=0.046) were risk factors for the occurrence of persistent isolated hypothyroxinemia in the first and second trimesters of pregnancy. Persistent isolated hypothyroxinemia in the first and second trimesters was associated with anemia during pregnancy(n OR=1.9, 95%n CI 1.1-3.2, n P=0.024).n Conclusions:Pregnant women who are older and heavier before pregnancy should pay more attention to their thyroid function. Pregnant women with persistent isolated hypothyroxinemia in the first and second trimesters should be concerned for anemia.