临床资料患者，女，３９岁，因牙龈出血二天到口腔科就诊。现病史：就诊前两天始左上后牙牙龈反复出血，每次出血量少，能自止。自诉全身健康，近日亦无不适，最近一次月经期比以前延期一天，月经量稍增多。全身检查：全身情况良好，脸色基本正常，皮肤无出血点或瘀斑。口腔检 Clinical data The patient, female, 39 years old, came to the dentistry department for bleeding gums for two days. History of the current medical history: two days before the beginning of the treatment, left and right posterior teeth and gums repeatedly bleed. Self-reported body health, no discomfort in recent days, the latest menstrual period than the previous one-day extension, slightly increased menstrual flow. Whole body examination: The whole body is in good condition, his face is normal, and there is no bleeding or spotting on the skin. Oral examination