Additional file 11.

Number of probes showing variation at each gestational age. Venn diagram of variable probes (s2 > 0.02) in each gestational age. This analysis revealed that the vast majority of variable probes are only variable in third trimester, while 52 were only variable in second, and 21 only in first trimester. A total of 47 probes were variable across all gestational ages.

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Novakovic et al. BMC Genomics 2011 12:529   doi:10.1186/1471-2164-12-529