I would like to add my .02 worth on weight loss.  I totally agree with you,
Jan B. and would like to bring this thought further.  Not only are
hospitalized women filled with IV fluids, but the baby may be weighed before
ever voiding or stooling (that is peeing and pooping for the non medical
'netters), being wisked away ever so quickly by the ever so efficient RN
(sarcasm intended) ...or the baby may cuddle and nurse and bond with mom for
a bit, proceed to pee and poop and then be weighed.  Those first ounces are
never even counted.
Then there are those babies who have their first stools during labor, have
major meconium blow out, go to NICU (that weight is never counted) and
amazing that those babies don't loose the same amount (%) of weight.  The
home birth  and birth center babies are not loaded with extra fluids and are
not weighed so quickly.  Nor do nurses look at the recorded output before
declaring how much weight babies are losing.   That nice breastfeeding baby
has lots of stools since colostrum has a laxative effect.  So much for my
.02.

Linda in sunny Southern California