Fathers of daughters tend to be more loving, committed, and supportive partners than fathers of sons, according to research from Rutgers University. This phenomenon, dubbed the 'girl dad' effect, appears to manifest shortly after a daughter's birth and may be strongest during her early years.
The study, which analyzed data from 1,694 parents from pregnancy through several years post-birth, found that fathers of daughters were more likely to report feeling attached to their partners. They also reported higher levels of satisfaction within their relationships when compared to fathers of sons.
Conversely, mothers of daughters indicated receiving more affection, encouragement, fairness, and support from their partners than mothers of boys. The shift in fathers' relationship attitudes was observed to be immediate following the birth of a daughter, with an increase in relationship security and reported support for their partners.
The researchers noted that this effect appears unique to fathers, as mothers did not show a similar pattern. One hypothesis for this 'daughter effect' suggests that fathers may instinctively perceive a stable partnership as crucial for their daughters' future well-being. Alternative explanations include potential biological changes, such as hormonal shifts, that could foster nurturing and pair-bonding behaviors in fathers. Social factors, such as increased protectiveness and a heightened sense of responsibility towards the family upon having a daughter, are also considered.
Lead author Krystal Duarte stated that the findings suggest daughters may influence not only their fathers' parenting but also strengthen their investment in romantic relationships, leading to increased commitment and support. The study was published in the journal Personality and Individual Differences.