论文部分内容阅读
运用病例一对照的研究方法,在排除了口服避孕药、怀孕、生殖系统肿瘤病等因素对雌性激素水平影响的情况下,比较了研究对象基础状态雌二醇、孕酮水平的
Using the case-control study, the effects of oral contraceptives, pregnancy, reproductive system oncology and other factors on estrogen levels were compared, and the basal estradiol and progesterone levels were compared