Figure 4From: Human steroidogenesis: implications for controlled ovarian stimulation with exogenous gonadotropinsIntrafollicular concentrations of progesterone in relation to follicular development in women during the follicular phase of the natural menstrual cycle. Filled circles show the dominant follicles and open circles show the non-dominant follicles. Adapted from Schneyer AL et al. 2000 [29].Back to article page