Analysis of variance (ANOVA) of the relative brain sizes and other parameters at birth.

The genotype CC is compared against HC and HH and a dominant effect is assumed. Among the four variables considered, only the genotype and length of pregnancy in weeks were significant (p value <0.05). The rest of the variables including the body weight in grams and genders, all have p values greater than 0.05, indicating that they were not associated with the relative brain sizes. *Dominant effect is assumed. The genotype CC is compared with HC and HH.