Age-related decrease in anti-Mullerian hormone concentration according to Crohn’s disease behavior. Left pane: non-colonic disease (solid line, slope −0.137±0.05) vs. colonic disease (dotted line, slope −0.331±0.011), slope difference −0.195±0.123, p=0.12. Right pane: non-fistulizing disease (solid line, slope 0.153±0.05) vs. fistulizing disease (dotted line, slope −0.184±0.1), slope difference 0.031±0.12, p=0.795.