It went something like this: At the peak of a contraction, Saberhagen would politely suggest that Janeane breathe in through her nose and out through her mouth. (si.com)
You may find that you spend a few seconds at the peak of each contraction stopping what you're doing but generally, you are able to talk through them. (verywellfamily.com)
At the peak of a contraction, it might be necessary to change the pace of your breathing (not many people can maintain slow, deep breaths through pain). (health-and-parenting.com)