Methods Following the standard made by World Health Organization about DMFT and GI of pregnant women.The survey on their dental care activities is taken by distributing questionnaires.

• 方法按照世界卫生组织制定的标准检查孕妇的龋失补数(DMFT)和牙龈指数(GI),以问卷形式记求其口腔行为,并结合孕妇的口腔保健行为进行分析。