Griffin et al. Journal of Experimental & Clinical Assisted Reproduction 2006 3:2   doi:10.1186/1743-1050-3-2
Figure 4	Resolution: standard / high

Oocyte Growth in Maturational Stages. Bar graph of oocyte diameter versus follicular stage, * indicates values from previously published data for reference [12], and therefore do not include error bars. Values are the mean ± standard error.