Scientists find clue to 'maternal instinct'

Oxytocin is referred to as the love hormone and is important in the regulation of social and maternal behavior. The oxytocin system in the brain may be key to new treatments for many mental health disorders including postpartum depression. A biologist has discovered a group of cells that are activated by oxytocin in one area of female mouse brains that are not present in the same area in male mouse brains.