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. Author manuscript; available in PMC: 2016 Jan 1.
Published in final edited form as: Behav Genet. 2014 Dec 10;45(1):71–83. doi: 10.1007/s10519-014-9693-3

Figure 4.

Figure 4

Expected sex adjusted phenotypic cohort trends based on twin subsample results assuming a population average with subgroups possessing genetic dispositions for early and late adoption of novel fertility behaviors. A. Phenotypic trends in completed fertility for the population average, a subgroup with genetic dispositions for late adoption (i.e., +1 SD genetic effect), and a subgroup with genetic dispositions for early adoption (i.e., −1 SD genetic effect). B. Phenotypic trends in age at first birth for the population average, a subgroup with genetic dispositions for late adoption (i.e., −1 SD genetic effect), and a subgroup with genetic dispositions for early adoption (i.e., +1 SD genetic effect).