A new research shows that having a baby may alter men's brains to turn them into better dads and partners.
Craig Kingsley and Kelly Lambert, whose previous research lead to Katherine Ellison's 2005 book The Mommy Brain, are studying fatherhood in both humans and animals.
They noticed when male deer mice were exposed to baby deer mice - even if the babies aren't their own - motivation and problem-solving areas of their brains grow. Male titi monkeys also experience the same changes.
In men, scientists found that levels of prolactin increased after the birth of a child. Prolactin is a hormone that influences lactation in women, and increases responsiveness of men to a baby's cry. Testosterine, which influences mate seeking and agression, also decreased in men.
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