Another thought on this - A lot depends on the nature of the presentation and
the teaching strategies used.

Lecture-with-slides in a darkened room on a difficult topic requires more
concentration and less distractions. This is "passive learning" and although
common, not the best way to present all topics. This is the kind of stratgegy
that brings the gripes about noisy babies in my own experience.

Interactive activities like teaching positioning using dolls is a loud and
boisterous time anyway - a baby of any age/noise level is a big plus in this
exercise! Teaching positioning with slides is a less effective method of
presenting the same topic.

Social times like lunches - bring all babies!

So - try some different strategies before you ban all noise-making activities
including babies. Reserve the dry methods like lectures for things you can't
teach any other way.

Linda Smith, knowing that you can't learn to swim without getting wet. Bring
the babies. especially when teaching about normal breastfeeding!