The expression of LH receptor mRNA was not detected by RT-PCR in control group when the diameter of an follicle was less than 7 mm,while it was detected in women with PCOS when it remained as small as 4 mm.

• 对照组卵泡直径小于7 mm时,RT-PCR检测不到颗粒细胞LH受体mRNA表达,而PCOS组卵泡直径达到4 mm时,发现颗粒细胞LH受体mRNA已提前表达。