In summary, rs7632287 and measures indicative of pair-bonding were associated within two independent samples. To gain better understanding of pair-bonding in a broader phenotypic sense and to be able to investigate rs7632287 in relation to other relevant phenotypes related to pair-bonding behavior, this investigation was extended to include potential developmental precursors of pair-bonding behavior in adulthood. The longitudinal design of the TCHAD sample allowed us to investigate whether early childhood behaviors predict future behavior in romantic relationship. To this end we used the Child Behavioral Checklist inventory (CBCL) (64) reported by parents in the first wave of the TCHAD study (at age 8–9). Using stepwise regression, we found that the parent-reported CBCL social problems subscale (a scale assessing a variety of difficulties that children may display in their relationships with peers and adults), but no other CBCL subscale, was significantly (r=−0.14, p=0.004) associated with girls’ behavior in romantic relationships at ages nineteen to twenty years. Further, we demonstrated that for girls the CBCL social problems scale was associated with the rs7632287 genotype (Table 4c). Consistent with the association between the
