Figure 1.
Distribution of Reproductive Phenotypes in 269 Hutterite Men
(A) Family sizes. Black bars represent completed families (either the wife is > 45 years old, or the couple has not had a child in > 6 years; n = 146), light gray bars represent incomplete families (n = 123). Due to the high number of couples who have not completed their families, the number of years from marriage to last birth was used as a covariate in the analysis of family size, in order to adjust for the length of the reproductive period.
(B) Birth rates, defined as number of births per year of marriage. Mean number of births for the couples in each interval are shown in diamonds (right x axis); SE is shown as a vertical bar if there are more than three couples for each interval.