Women all over the country are cashing in on what people are calling a mother's natural liquid gold: human breast milk.
A month's supply can cost anywhere from $300 up to $1,200 dollars. In contrast, a month's worth of formula costs an average of $200.
For Kamilla Vainshtok and other women like her, the transactions – all done online – can literally "pump up" their income.
"Onlythebreast.com is basically a Craigslist for breast milk," Vainshtok told "Good Morning America." "There's buyers and...
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