female:male ratio in K-3 kids

[Sophie Wilson]

Kim Cuddington (kcudding at uoguelph.ca) wrote:

: I dimly remember something from a biology class that more human males are 
: conceived than females, but that there is a higher attrition rate for 
: male fetuses. Perhaps medical techniques, improved nutrition etc are 
: helping more males survive?? Okay, maybe not!

: Cheers,
: Kim

And I dimly remember from a biology class that as women 
age, they are more likely to produce female babies than male babies.  Is 
it possible that the average age of the MOTHERS might be a factor here?

Sophie