Joy,

This is what I've read (fairly recently, ie within the last 6 months)
but I have looked and looked and can't find WHERE I read it.  I've
heard the "sponge" analogy before too, and now I don't know what to
believe.  These two different processes would have different results:
 with the "sponge" effect, foremilk would increase in volume over
time, but the fat percentage would remain constant; with the osmosis
effect, the foremilk would both increase in volume and decrease in
fat ratio over time.

Jennifer Landels, BA, CE
Vancouver BC


>Jennifer, do you mean that the fluid passes through the duct walls to
>dilute the milk in the sinuses? This is an interesting concept. What do
>others think about this? I just assumed that the milk flows down the ducts
>from the alveoli, minus most of the fat which stays adhered to the alveoli
>walls, until ejected by the let-down reflex.