Dr. Nils Bergman speaks in his research to the rising levels of cortisol in infants separated from their mother, these stress hormones are associated with increased illness. I am just in the middle of a pop science book called Genome that speaks to this. Bergman's research also speaks to changed patterns of breathing in infants separated from their mother. This stress patterned breathing is something I have always assumed is normal since I hear so much of it. So infants in cribs would have much higher levels of cortisol and therefore higher levels of illness. Pat Thomas PHN IBCLC Winona County Community Health Winona, MN *********************************************** 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