Re: Calcium Supplements Do not Build Strong Bones.

"Cows don't give milk only for a certain amount of time after giving birth....."

Neither do humans.  Wet nurses have been around since the beginning of time and have only fallen out of favor since the era of bottle formulas.  A wet nurse is perpetually giving milk - just like a cow, and there are still a few out there in the USA.  The ability of a human woman to remain in lactation is not limited to "a certain amount of time after giving birth."  In fact, human females can induce lactation - even if they have never given birth.

http://www.associatedcontent.com/article/297264/inducing_lactation_without_pr...