![]() Mothers produced more milk overall for females, and over the course of their breast feeding, they received the same amount of fat as the males. Speaking at the American Association for the Advancement of Science meeting in Chicago, Hinde described her work in rhesus monkeys that showed mothers produce milk with 35% more fat and protein for male babies, and even richer milk when the male was first-born.īut when mothers fed female babies, their milk was less fatty and had more calcium, probably to support the faster growth of their skeletons. "We have good reason to be sceptical of a one-size-fits-all formula," said Prof Katie Hinde, an evolutionary biologist at Harvard University. The findings have led some researchers to suggest that baby formula should come in boy and girl formulations to match the differences seen in breast milk. Scientists suspect that breast milk may be tailored by nature to meet the different growth needs of the sexes. ![]() ![]() The make-up of the milk has a direct impact on the child's growth, but also on his or her behaviour and temperament, which may last for the rest of their life.
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