Womens hormones are better set up to aid in the attachment process. Due to oestrogen and oxytocin. Oestrogen is links to emotional sensitivity which puts men at a disadvantage as testosterone does the opposite. Oxytocin is flooded during birth and aids with the attachment process. These biological differences could account for traditional roles.
in 1999 he found that fathers are less likely to detect low levels of infant stress, compared to mothers. The results show the lack of oestrogen in men, mean they are not equiped to form close relationships with their children.
Men can also undergo hormonal changes when they become fathers. Testosterone drops and oxytocin rise. In father oxytocin facilitates physical stimulation of infants during play and synchronization of emotion. This also helps to treat male post natal depression.