In a message dated 97-02-25 09:49:45 EST, you write: << I have a new premie mom using a Lactina. She is not the first mentioning or asking about the release of sucking of the pump making a burping sound, with some milk leakage but she is the first to describe that the milk burped so much that it sprayed her in the face! I have seen it and heard it myself with other moms; sometimes it happens, sometimes it doesn't within a pumping session. >> I would suggest the flange doesn't fit. If her nipple does not fit down in the "throat" and just "bounces" around in the flange resulting in leaks and sprays, she needs a different size or shaped flange. E-mail me privately if you''d like some suggestions. Liz Flight, RN, IBCLC