Figure 1: Immature oocytes from different sources. (a) GV-stage oocyte from woman with C-section; (b) GV-stage oocyte from woman with PCOS after priming with FSH alone; (c) M-I stage oocyte from woman with regular ovaries after priming with FSH and hCG. Bar indicates 60 μm. Arrows indicate GV in the cytoplasm. GV: Germinal vesicle; M-I: Metaphase-I; FSH: Follicle-stimulating hormone; PCOS: Polycystic ovaries syndrome; hCG: Human chorionic gonadotropin.