Fig. 1

FSH acts directly on ovary surface epithelium (OSE). H&E-stained sections of mice ovaries after two (left panel) and seven (right panel) days of PMSG treatment (5 IU). Note proliferation of OSE (arrowheads) and small protuberances were prominent [Scale: A 100 μm, B-E 20 μm]. Seven days later (right panel) increased cohorts of primordial follicles were observed just below the OSE [Scale: 100 μm]. Besides stimulating follicular growth, FSH stimulated OSE cells proliferation [20]