Rich Schanler MD, who does superb research on BM for premies, measured
triglyceride (TG) levels in those premies who got hindmilk
(Valentine/Hurst/Schanler article).  He saw no difference after two weeks.  I
am not sure anyone has measured TG out farther than that, because it usually
only takes a week or two of hindmilk feeding to "jump start" the growth.
Neonatologists DO measure TG levels - in any baby on hyperalimentation (TPN),
usually once a week - too much fat can worsen respiratory problems.
Nancy Wight MD, IBCLC
Neonatology
San Diego CA

             ***********************************************
The LACTNET mailing list is powered by L-Soft's renowned
LISTSERV(R) list management software together with L-Soft's LSMTP(TM)
mailer for lightning fast mail delivery. For more information, go to:
http://www.lsoft.com/LISTSERV-powered.html