Could having a daughter influence how a father relates to her mother? Research led by Rutgers University suggests it may, finding that fathers of girls reported stronger attachment and commitment to their child’s mother than fathers of boys. The finding raises an interesting possibility that children help shape the relationships they grow up watching.
Across three studies involving nearly 1,700 people, researchers examined how parents described their relationships and the support they received from one another. The results point to a connection between having a daughter and fathers’ investment in their partnerships, while leaving open the question of why that connection exists.
What the researchers found
The work comes from researchers including Krystal Duarte and Kristina Durante at Rutgers Business School’s Center for Women in Business. Their study appeared online on June 8, 2026, ahead of the November issue of Personality and Individual Differences. Rutgers highlighted the findings in a September 21 announcement.
The team looked at several aspects of a couple’s connection, including attachment, trust, intimacy and commitment. In the first study, fathers of daughters averaged 6.71 for commitment on a seven-point scale, compared with 6.14 among fathers of sons. Those are group averages, leaving room for very different experiences within either group.
“Having a daughter appears to be protective of the primary parent relationship,” Durante said in the university’s announcement. The researchers also sought mothers’ perspectives, which supported the finding that fathers of daughters were perceived as more attentive partners. That adds another viewpoint beyond fathers’ descriptions of themselves.
Looking at life before and after birth
Were these differences already present before parenthood? To investigate, the third study followed 168 couples expecting their first biological child, collecting questionnaires six weeks before birth and at six-month intervals through age two. No statistically significant differences by the baby’s sex appeared in the prenatal relationship measures.
After birth, fathers of daughters showed more favorable patterns in attachment and partner support. Their relationship satisfaction stayed relatively stable, while it declined among fathers of sons. This timing strengthens the evidence for a connection with the transition to fatherhood, but observational data cannot establish cause and effect.
The relationship a daughter grows up watching
One explanation proposed by Duarte and Durante centers on the example fathers provide. Earlier research, described in the Rutgers announcement, suggests that fathers can influence daughters’ expectations about whether men will be dependable in future relationships. The team asked whether that influence might also work in the other direction, with daughters encouraging greater commitment from fathers.
In this interpretation, a father’s treatment of the mother offers a daughter an early example of partnership. Being attentive, supportive and dependable could help establish what she expects from a future partner, even without anyone sitting down for a formal conversation. The lesson would come through everyday interactions.
Think of the ordinary moments when one partner listens after a difficult day or follows through on a promise. Those are illustrations of the researchers’ proposed explanation, rather than specific behaviors this study proved daughters learn from. The idea is plausible, but the pathway still needs testing.
Hormones and cultural expectations could play a role
The researchers also point to biological changes associated with becoming a father. Previous work has linked fatherhood with lower testosterone, which may support caregiving and the motivation to maintain a close partnership. But that general connection applies to fathers of sons as well as daughters, so it does not by itself explain the difference reported here.
Cultural expectations offer another possibility. Duarte and Durante suggest that having a daughter could bring protective attitudes into focus or change how couples perceive their family’s needs and vulnerabilities. Several influences could operate together, and the findings do not establish which explanation carries the most weight.
What the findings mean for families
The distinction between being a partner and being a parent matters throughout this research. Duarte cautioned that fathers of daughters are “not necessarily better dads,” describing the finding instead in terms of how present they seem to be for their partners. Attentiveness within a couple and the quality of someone’s parenting are related questions, but they are different things to measure.
The samples centered on one-child families or first-time biological parents in the United States. Whether similar patterns hold across cultures, families with several children or same-sex partnerships remains unresolved. A group-level association also cannot predict an individual father’s behavior or make a child responsible for maintaining an adult relationship.
For readers, the interesting question is how becoming a parent may reshape the attention and commitment adults bring to one another. The study opens that question while leaving the explanation unsettled. The press release was published on Rutgers University’s website.
Photo: Caroline Hernandez carolinehdz / Wikimedia Commons (CC0)
