为了进一步了解世居高原不同民族妇女的月经生理情况,继2295例世居青海高原汉、回、藏三民族妇女月经生理情况调查之后,对农业区互助县土族妇女进行了补充调查。本文对青海高原不同海拔、不同民族共2492例作如下分析比较。西宁地区海拔高度为2226公尺,大气压力为580毫米汞柱,空气中氧分压为122毫米汞 In order to further understand the menstrual physiology of women of different nationalities on the plateau, a survey was conducted on the menstrual physiology of 2295 Chinese women living in the Hui, Hu and Hsia in the Qinghai-Tibet Plateau. In this paper, 2492 cases of different elevations and altitudes of Qinghai Plateau are analyzed and compared as follows. Xining area altitude of 2226 meters, the atmospheric pressure is 580 mm Hg, the partial pressure of oxygen in the air is 122 mm Hg