Glenda, references on milk storage and heating: Barger, J and Bull, P., 1987. A comparison of the bacterial composition of breast milk stored at room temperature and stored in the refridgerator. Int J Childbirth Educ 2:29-30. Goldman, A.S., et al. 1980. Effects of storage container upon immunologic factors in mature milk and colostrum. HM:Bio & Soc Value n:197-205. Nwanko, M.U., et al. 1988. Bacterial growth in expressed breast milk. Ann Trop Pediatr 8:92-95. Pardou, et al. 1994. Human milk banking: influence of storage processes and of bacterial contamination on some milk constituents. Biol Neonate 65: 302-309. Pittard, W.B., et al. 1985. Bacteriostatic qualities of human milk. J Pediatr 107:240-43. Sigman, M., et al. 1989. Effects of microwaving human milk; changes in IgA content and bacterial count. J Am Diet Assoc 89:690. Sosa, R. and Barness, L. 1987. Bacterial growth in refridgerated human milk. Am J Dis Child 141:111-12. Catherine Watson Genna, IBCLC NYC [log in to unmask]