在卵泡期, HSD17B1的mRNA表达（中位数0.06；四分位数间距0.05-0.07 vs. 0.17；0.03-0.2, p=.010）和CYP19A1的mRNA表达 (0.08；0.07 - 0.14 vs. 0.22；0.09-0.54, p=.025)在乳腺癌患者中低于对照组。
In the follicular phase, mRNA expressions of HSD17B1 (median 0.06; interquartile range 0.05-0.07 vs. 0.17; 0.03-0.2, p = .010) and CYP19A1 (0.08; 0.07-0.14 vs. 0.22; 0.09-0.54, p = .025) were lower in women with breast cancer than in controls.