Figure 2. Time course changes in the expression of genes involved in ovarian steroidogenesis at 0, 48, and 56 h after PMSG injection and 4, 8, 12, 24, 48h after hCG injection in 21-day-old mice. Data were expressed relative to mRNA expression in the ovaries before PMSG (=1.0). Different letters (a and b)indicate significant changes in the expression of each gene (p<0.05). *p<0.05, significant difference between PMSG-primed mice at 56 h with or withouthCG. Straight line and dotted line indicate hCG treatment at 48 h after PMSG treatment and no hCG treatment, respectively. n=5 in each group.