Fig. 1From: Effect of bone morphogenetic protein-4 on in vitro growth, steroidogenesis and subsequent developmental competence of the oocyte-granulosa cell complex derived from bovine early antral folliclesEffect of BMP-4 on progesterone (P4) production by GCs during IVG culture. abcDifferent letters represent differences among the same doses of BMP-4 (P < 0.05). xyDifferent letters represent differences within same day of culture (P < 0.05). Bars represent the standard deviationBack to article page