Growth retardation of Ebp1-/- mice. A. Photograph of wild type and Ebp1-/- male littermates at Day 30. B. Wild type, Ebp1+/- and Ebp1-/- littermates, derived from crosses of heterozygous parents, were weighed over a period of 60 days. Results are plotted as the mean body weight ± standard error of the mean. C. Wild type and Ebp1-/- male and female mice, the progeny of crosses of homozygous animals, were weighed at the days indicated. Two litters each were weighed KO = 9 mice, WT = 15. (*p = .013 at Day 10, p = .02 at day 18).