Could my child vomit during lessons?

Our goal is that no child ever vomits. However, it does occasionally happen. Most often this is due to feeding issues. We ask parents to avoid feeding children for 1.5-2 hours prior to lessons because having food in the stomach while learning breath holding can cause discomfort. When a child is first learning to hold his/her breath, he/she will often swallow some air which can cause big burps. If a burp gets under food remaining in the tummy, it can cause vomiting. For this reason, we ask parents to maintain B.U.D.S. sheets accurately and follow the eating guidelines outlined for your children.