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Date: | Wed, 7 Mar 2007 21:07:30 EST |
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A few points.
Often the midwives at our hospital use pumping to try to stimulate labor in
women who are near their due date, and aren't able to in many of them.
Remember that colostrum is concentrated - less water content; some of its
components are coming from the paracellular pathway - between the milk cells
that don't have tight junctions in the early days.
Progesterone, which maintains the pregnancy, competes for the receptor sites
on the milk cells with prolactin. Why isn't there mature milk before the
baby is born? { Well, the baby doesn't need it yet, ;-) } It's because the
great amount of progesterone produced by the placenta is blocking prolactin from
the receptors on the milk cells. So I don't think she would bring in mature
milk by pumping.
After the birth when enough prolactin is able to attach to the receptors
(as the progesterone clears from the circulation) the milk cells begin to make
more lactose, lactose draws water into the cells and thereby increases the
milk volume. Antibodies are still present , but since mature milk is more
dilute the baby has to drink more milk to get the same amount of antibodies that
would have been in colostrum. So the baby isn't deprived of antibodies.
Mardrey Swenson
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