This angle also keeps the nipple full of milk, helping to reduce the chance of baby swallowing air. (chiccousa.com)
When babies swallow air during feeding, it can cause quick contractions of the diaphragm muscle which snaps the opening of the vocal cords shut, making the hiccup sound. (mommysbliss.com)
«If baby swallows less air, she has less to burp or spit up,» Shu says. (pregnancymagazine.com)