passages.id: split_8_test_3287_passage
passages.type: progene_text
passages.text: The expression of all genes changed significantly as follicles grew , with a decrease in the expression of StAR , P450scc , 3beta-HSD and P450c17 with maturation , and an increase in the expression of 17beta-HSD3 during vitellogenesis and 17beta-HSD1 and P450aromA during previtellogenesis .