Neonates from 2 independent litters of Ccnd1+/KI × Ccnd1+/KI crosses were sacrificed at birth and genotyped. Mice were organized by genotype and total size measured.Mass of neonates was calculated at birth and average mass quantified (n = at least 4 mice per group).Mice were weighed weekly, and growth is plotted as the average mass of each genotype/week (left: male, right: female, n > 5 per gender and genotype). 