A friend of mine sent me this article :
When Did Girls Start Wearing Pink?
http://www.smithsonianmag.com/arts-culture/When-Did-Girls-Start-Wearing-Pink.htmlGood read that discusses that it's only been since around the 40's that the pink for girls, blue for boys thing took off ... that previously little boys and little girls wore the same things and how people didn't immediately have to know the gender of a child.
Some good quotes ...
For centuries, she says, children wore dainty white dresses up to age 6. "What was once a matter of practicality—you dress your baby in white dresses and diapers; white cotton can be bleached—became a matter of 'Oh my God, if I dress my baby in the wrong thing, they'll grow up perverted,' " Paoletti says.
"One thing I can say now is that I'm not real keen on the gender binary—the idea that you have very masculine and very feminine things. The loss of neutral clothing is something that people should think more about. And there is a growing demand for neutral clothing for babies and toddlers now, too."