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Effect of recombinant vascular endothelial growth factor (VEGF) on the activation of primordial follicles in cultured P0 Oog1pro3.9/R26-H2B-mCherry mouse ovaries. Mean ± SD (n = 3 for 200 ng/ml, n = 4 for 50 ng /ml, n = 5 for 100 ng /ml, and n = 12 for control.
