Hi Becky.
you could do a search on Medscape for 'analgesic+breastfeeding+newborn'

I came up with this
http://www.medscape.com/viewarticle/431023


Breast-feeding Is Analgesic in Healthy Newborns


Jennifer Warner

NEW YORK (MedscapeWire) Apr 04 - Breast-feeding virtually eliminated crying
and grimacing in infants who were breast-fed while undergoing a painful
procedure, according to a study published in the April issue of Pediatrics.
Researchers say several aspects of breast-feeding, such as taste, suckling,
and skin-to-skin contact, have already been shown to relieve pain
individually in animal studies. But this study is among the first to look at
the complete act of breast-feeding as a way to prevent pain in human
infants.

In the study, 30 infants were held and breast-fed by their mothers while a
blood sample was taken from the child's heel (a procedure known as heel
lance) while researchers monitored the baby's reactions.

Crying and grimacing was reduced by 91% and 84%, respectively, among infants
who were breast-fed during the procedure compared with babies who had the
procedure under standard circumstances (swaddled in their bassinets). In
fact, 11 of the 15 breastfeeding babies did not cry or grimace at all during
the procedure. Researchers say this suggests that breast-feeding may
actually prevent pain from starting.

"When watching these infants on videotape, we could not tell when blood
collection was either initiated or terminated," write the authors. "We
believe that this reflects pain blockade, as opposed to suckling producing a
behavior that is incompatible with crying."

The study also showed that breast-feeding prevented the normal rise in heart
rate that accompanies pain.

The researchers say these findings show that pain relief and stress
reduction should be added to the long list of proven benefits of
breast-feeding.

Pediatrics. 2002;109(4):590-593 [Abstract]

Reviewed by Charlotte E. Grayson, MD

Marsha Walkers 'just one bottle' gives you lots of references
http://www.naba-breastfeeding.org/images/Just%20one.pdf

as does this
http://www.lalecheleague.org/cbi/biospec.htm
or this
http://www.naba-breastfeeding.org/images/Hazards.pdf
although they are talking about formula there may be a reference in there
that suits you

got to go
sure others will have ideas too
Karen Clements IBCLC
Melb Aust

             ***********************************************

To temporarily stop your subscription: set lactnet nomail
To start it again: set lactnet mail (or digest)
To unsubscribe: unsubscribe lactnet
All commands go to [log in to unmask]

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