Fig. 1From: Estrogen alleviates post-traumatic osteoarthritis progression and decreases p-EGFR levels in female mouse cartilageSerum estrogen levels of mice. (A). female control group; (B). ovariectomized group; (C). ovariectomized group supplemented with estrogen; and (D). male group; Group B compared with group A (* * P < 0.01)), group C compared with group B (# # P < 0.01)), and group D compared with group A (☼☼ P < 0.01)Back to article page