Fig. 4From: Concentrations of oocyte secreted GDF9 and BMP15 decrease with MII transition during human IVMMean concentration of GDF9, BMP15, and GDF9/BMP15 heterodimer in spent media after IVM according to oocyte meiotic stage: germinal vesicle (GV; n = 43) or metaphase II (MII; n = 51). Error bars represent SEM. *P = 0.02; **P = 0.002Back to article page