William Sears argues that breastfeeding greatly accommodates mother-child-attachment because it triggers the release of oxytocin in the mother which supports her emotional bonding with the child, notably in the first ten days after childbirth.[27] In opposition to bottle feeding which tends to being done in 3 to 4 hour intervals, breastfeeding enables the mother, too, to perceive the child’s moods and needs exactly.[28] Since the half-life period of the hormons prolactin and oxytocin (which promote bonding) are very short, Sears recommends to breastfeed very frequently, newborns in particular (8 to 12 times a day).[29] He claims that the hours between 1 and 6 am are the most beneficial for breastfeeding.[30] In general, Sears argues that breastfeeding is beneficial for the health of both child and mother.[31] He claims that infants up to 6 months should be exclusively fed with breast milk, since he believes that, at that age, children are allergic to all other foods.[32]