Do Daughters Get More Milk Than Sons? - KULR-8 Television, Billings, MT

Do Daughters Get More Milk Than Sons?

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Got milk?
New research shows that daughters may be getting more of it than sons.

"Believe it or not, cows that had given birth to a daughter, or a heifer, actually produced about 3 percent more milk in their first lactation than those that gave birth to a bull.," says Research Barry Bradford.

Researchers from two universities studied lactation records of more than 1 million dairy cattle across the country.
What they found was opposite of what evolutionary biology theories predict.
Instead of favoring sons, cows actually produce more milk for their female offspring.

"I grew up with eight sisters and as the only son, I've been working my whole life to try to prove that I wasn't treated specially so now we finally have some evidence to the opposite, actually," says Bradford.

The study also found that the sex of the first baby might determine the amount of milk produced for the following children. It's possible that the same processes are happening in humans.

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